KR100801892B1 - Method and apparatus for emergency call connection in multi-mode portable terminal - Google Patents

Abstract

A method for performing emergency call connection in a multi-mode portable terminal and a device are provided to conduct emergency call connection by searching networks supported by the terminal regardless of network setup of the terminal, thus the emergency call connection can be quickly performed in an emergency. If an emergency call connection request is sensed while a user information card does not exist, networks supported by a portable terminal are searched(301-305). If heterogeneous networks are searched among the supported networks, the terminal accesses the heterogeneous networks by using heterogeneous network registration information prestored in the terminal, and performs emergency call connection(307-313). If a mobile communication network is searched from the supported networks, the emergency call connection is executed through the searched network(315).

Description

METHOD AND APPARATUS FOR EMERGENCY CALL CONNECTION IN MULTI-MODE PORTABLE TERMINAL}

1 is a view showing a structure using a multimedia service using a general multi-mode portable terminal,

2 is a block diagram showing the configuration of a multi-mode portable terminal according to the present invention;

3 is a diagram illustrating a process for performing emergency call connection in a multi-mode portable terminal according to one embodiment of the present invention;

4 is a diagram illustrating a process for storing information required for accessing a heterogeneous network in a multi-mode portable terminal according to another embodiment of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication system. In particular, the interworking of an IP multimedia subsystem (IMS) network and a circuit switch (CS) circuit is referred to. A method and apparatus for making an emergency call of a possible multi-mode portable terminal.

With the rapid development of communication technology, it has reached the stage of providing a high-speed data service capable of providing multimedia services such as e-mail, still images, video, etc. to mobile terminals as well as general voice services.

The so-called 3rd generation (3G) mobile communication systems supporting both general voice service and packet service include synchronous CDMA 20001x systems and asynchronous Universal Mobile Telecommunication Systems (UMTS). The third generation mobile communication system as described above provides a multimedia service to a portable terminal through interworking with an IMS network and other networks.

The portable terminal capable of interworking with the IMS network and other networks uses a voice data service in a circuit switch network such as a UMTS (Universal Mobile Telecommunication System) (UMTS) and a Global System for Mobile (GSM). In a WLAN environment, a multi-mode portable terminal that can use VoIP services.

The IMS was introduced as a release 5 standard in the 3rd Generation Partnership Project (3GPP), which is a standard research organization of the 3rd generation mobile communication system.

In other words, the IMS is a network for effectively supporting the demand for wireless data and multimedia services in the mobile communication network while supporting the existing voice service as it is. The IMS network uses a Session Initiation Protocol (SIP) for transmitting control signals and messages between the network components.

FIG. 1 is a diagram illustrating a structure using an IP Multimedia Subsystem (IMS) network using a general multi-mode portable terminal.

Referring to FIG. 1, an IP Multimedia Subsystem (IMS) network includes a Call Session Control Function (hereinafter referred to as Call Session Control Function) that is responsible for registration and multimedia call processing functions using a Session Initiation Protocol (SIP) protocol. 110) and the home location register (HLR) function of the legacy mobile network have functions for mobility management and authentication of IP multimedia users. It consists of an integrated Home Subscriber Server (hereinafter referred to as "HSS") 112.

Since the CSCF 110 performs different functions depending on the network in which the subscriber is located, Proxy-CSCF (P-CSCF), Interrogating CSCF (I-CSCF), and Serving CSCF (S- CSCF) can be logically divided.

The P-CSCF is the first point where the mobile terminal 102 connects to the IP multimedia network and exists in the same domain as the Gateway GPRS Support Node (GGSN). The P-CSCF forwards the SIP registration request message received from the mobile terminal 102 to the I-CSCF with reference to the home domain of the mobile terminal, and receives the SIP message received from the mobile terminal through a registration procedure. Transfer to the S-CSCF using the S-CSCF address. In addition, the mobile terminal 102 functions to request or respond to a SIP message.

The I-CSCF is the first point of access to the home network of the portable terminal 102, and several I-CSCFs may exist in one network domain.

The I-CSCF receives the address of the S-CSCF that performs SIP registration of the mobile terminal 102 from the HSS 112 and then selects the S-CSCF in charge of the actual registration or receives the SIP message received from another network. Route to S-CSCF.

The S-CSCF registers the session control server of the portable terminal 102 in the HSS 112, downloads and stores subscriber information of the portable terminal 102, and manages the session state of the registered mobile terminal. Provides relevant information.

Obtain the address of the I-CSCF of the home domain of the called mobile terminal through the dialed number of the mobile terminal 102 or the SIP URL, and the authentication information received from the HSS 112 at the time of registration of the mobile terminal 102. Perform authentication. It can also perform the function of P-CSCF.

The media gateway controller (MGCF) 106 is located at the contact point of the IMS network and the PSTN network to interwork a call, and manages and controls resources in the IMS-MGW 108.

The IMS-MGW 108 is a media gateway (MGW) used in the IMS network, and converts IP packet media data for interworking with a PSTN network into a form that can be transmitted on a bearer of a circuit switched network. Perform.

The multi-mode portable terminal as described above may use voice data service in a circuit switch network and VoIP service in a WLAN network according to a user's selection, but the network setting of the portable terminal is previously set to WLAN mode. If the WLAN connection is impossible in this state, there is a problem that the emergency call connection can not be performed quickly when an emergency occurs.

Accordingly, there is a need for a method and apparatus for quickly performing an emergency call connection regardless of a network setting of the portable terminal when making an emergency call connection using the multi-mode portable terminal.

In order to solve the problems as described above, an object of the present invention is to search for an accessible network network when an emergency call connection request occurs in a portable terminal capable of accessing a heterogeneous network, the first through the searched network network A method and apparatus for performing emergency call connection are provided.

Another object of the present invention is to provide a method and apparatus for storing information necessary for accessing a heterogeneous network in a portable terminal supporting the heterogeneous network.

Another object of the present invention is to provide a method and apparatus for performing an emergency call connection using previously stored heterogeneous network registration information when a user information card does not exist in a portable terminal supporting heterogeneous networks.

According to a first aspect of the present invention for achieving the above objects, there is a user information card for performing an emergency call of a multi-mode portable terminal supporting at least two different network connections. If it is detected that the emergency call connection request is not detected, the process of searching for a network network supported by the portable terminal, and if a heterogeneous network is searched among the network networks supported by the portable terminal, are stored in the portable terminal. After accessing the heterogeneous network using the heterogeneous network registration information, the process of performing the emergency call connection and the mobile communication network among the network networks supported by the portable terminal are searched through the searched mobile communication network. It characterized in that it comprises a process of performing the emergency call connection.

According to a second aspect of the present invention for achieving the above object, a method for storing heterogeneous network registration information of a multi-mode portable terminal supporting at least two different network connections, if the connection to the heterogeneous network is successful, And storing heterogeneous network registration information which is information used for heterogeneous network access.

According to a third aspect of the present invention for achieving the above objects, an apparatus for performing an emergency call of a multi-mode portable terminal supporting at least two different network connections is provided for communicating with a mobile communication network. A first communication unit for communicating with the second communication unit for communicating with a heterogeneous network, a user information card for storing user information of the portable terminal, and an emergency call connection request in the absence of the user information card, When the network network that can be connected to the device is searched and it is confirmed that the communication to the heterogeneous network is possible, the heterogeneous network registration information is used to access the heterogeneous network, and then the emergency call connection is performed. It characterized in that it comprises a control unit.

Hereinafter, the operating principle of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, detailed descriptions of well-known functions or configurations will be omitted if it is determined that the detailed description of the present invention may unnecessarily obscure the subject matter of the present invention. Terms to be described later are terms defined in consideration of functions in the present invention, and may be changed according to intentions or customs of users or operators. Therefore, the definition should be made based on the contents throughout the specification.

In the following description, a method and apparatus for enabling emergency call connection in a multi-mode portable terminal supporting at least two different network connections, that is, a mobile communication network and a heterogeneous network, will be described.

The heterogeneous network is meant to include all network networks except for a mobile communication network, and the following description will be given by taking a wireless LAN (WLAN) as an example.

In addition, the mobile communication network will be described by taking a GSM (Global System for Mobile) / GPRS (Global System for Mobile Communications / general packet radio service) network as an asynchronous mobile communication network, for example, the present invention is an asynchronous mobile communication network In addition, it can be equally applied to all networks that can be interworked with the WLAN environment such as a synchronization-based mobile communication network (eg, CDMA network).

2 is a block diagram showing the configuration of a portable terminal according to the present invention. As shown, the portable terminal includes a control unit 200, a user information card 202, a memory unit 204, a wireless LAN unit 206, a mobile communication unit 208, an input unit 210, and a display unit 212. It is configured to include.

Referring to FIG. 2, first, the controller 200 controls the overall operation of the portable terminal. For example, when an emergency call connection request is generated by a user in a state where the user information card 202 is present in accordance with the present invention, in addition to a normal function, the processing and control for voice call and data communication are performed. After searching all network networks supported by the portable terminal, the first selectable network network.

If the emergency call connection request is detected in the state where the user information card 202 exists, the controller 200 checks whether heterogeneous network registration information exists in the user information card 202, and the heterogeneous network. If it is confirmed that the registration information exists, it is processed to connect to the heterogeneous network using the information.

In addition, when connecting to the heterogeneous network, the controller 200 processes to store the heterogeneous network registration information necessary for the connection to the heterogeneous network in the memory unit 204.

On the other hand, the user information card 202 that can be attached to or detached from the portable terminal may be configured with a microprocessor and a memory chip, such as a SIM card, and user identification information (for example, a certificate, a unique characteristic of the portable terminal). Number (ESN: Electronic Serial Number, etc.) and applications for supporting various services are stored.

The memory unit 204 may include a program memory, a data memory, a nonvolatile memory, and the like. The memory is a program for controlling the overall operation of the portable terminal, temporary data generated during the operation of the portable terminal, system parameters, other storage data (telephone number, message, etc.) and a program necessary for the operation of the controller 200. And stores heterogeneous network registration information required when accessing the heterogeneous network according to the present invention.

The wireless LAN unit 206 performs communication for connection to a heterogeneous network under the control of the control unit 200. The mobile communication unit 208 performs communication for general call connection.

The input unit 210 includes a plurality of keys, and provides key input data corresponding to a key pressed by the user to the controller 200. The display unit 212 displays status information (or indicators) generated during the operation of the portable terminal, text input by the user, moving pictures, still pictures, and the like. Herein, the display unit 212 may use an LCD, and when the LCD is implemented in a touch screen manner, the display unit 212 may also operate as an input device.

A coder (Coder-Decoder) 214 connected to the control unit 200 and a speaker 218 and a microphone 216 connected to the codec 214 are voice input / output blocks used for phone calls and voice recording. to be. The codec 214 converts the PCM data provided from the controller 200 into an analog voice signal, transmits the same through the speaker 218, and converts the voice signal received through the microphone 216 into PCM data. It provides to the control unit 200.

3 is a flowchart illustrating a process for performing an emergency call connection in a portable terminal according to an embodiment of the present invention.

Referring to FIG. 3, the controller 200 of the portable terminal first supplies power to the portable terminal according to a user's request in step 301. Herein, the portable terminal supports a heterogeneous network (for example, WLAN environment based on IP Multimedia Subsystem (IMS)) and means a portable terminal in a state for attempting emergency call connection by a user.

In operation 303, the controller 200 determines whether a user information card (eg, a SIM card) 202 exists in the portable terminal. Here, the user information refers to information for confirming whether the user is an authorized user of the portable terminal (eg, a certificate, an electronic serial number (ESN) of the portable terminal, etc.).

If the user information card 202 does not exist, the controller 200 proceeds to step 305 to search for all network networks supported by the portable terminal. In other words, the portable terminal performs both a mobile communication network (for example, GSM network, UMTS network) and a heterogeneous network (for example, wireless LAN environment) regardless of the preset network setting mode of the portable terminal to perform an emergency call connection. Search.

In operation 307, the controller 200 determines whether the heterogeneous network is searched for. If the searched network is not the heterogeneous network (when the mobile communication network is searched), the controller 200 proceeds to step 315 to perform an emergency call connection through the searched mobile communication network.

If the network searched in step 307 is the heterogeneous network, the controller 200 proceeds to step 311 to obtain IMS registration information stored in a memory unit of the portable terminal, and then proceeds to step 311. Access to the IMS network using the obtained IMS registration information.

Here, the IMS registration information is information necessary for accessing the IMS network, and information of an access point (AP) of an IMS network which has recently accessed the connection (eg, Service Set Identifier (SSID)). , Security form, password information, etc.) and information (eg, personal authentication code (ID), password information, etc.) necessary for access to the access point.

Thereafter, the controller 200 proceeds to step 313 to perform emergency call connection through the connected IMS network.

If the user information card 202 exists, the controller 200 proceeds to step 317 and checks whether the IMS registration information exists in the user information card 202. If the IMS registration information does not exist in the user information card 202, the controller 200 performs the process of step 315.

If the IMS registration information exists in the user information card 202, the controller 200 proceeds to step 319 and attempts to access the heterogeneous network using the IMS registration information.

In this case, when the connection to the heterogeneous network fails, the controller 200 may perform an emergency call connection by searching for a mobile communication network.

In the above description, a method for performing emergency call connection according to the presence or absence of the user information card 202 has been described. However, even when the mobile communication network and the heterogeneous network are mixed, the emergency call connection is quickly performed. can do.

In other words, the emergency call connection through the heterogeneous network may be performed in the region where the heterogeneous network exists, and the emergency call connection may be performed through the mobile communication network in the region where the mobile communication network exists, and the heterogeneous network and the mobile communication network may be performed. In this mixed area, both the mobile communication network and the heterogeneous network can be searched, and then an emergency call connection can be quickly performed by selecting and accessing an accessible network.

4 is a flowchart illustrating a process of a portable terminal for storing information for using an IP Multimedia Subsystem (IMS) service according to an embodiment of the present invention.

Referring to FIG. 4, the control unit 200 of the portable terminal first checks whether the service connection with the heterogeneous network (IMS network) is detected in step 401.

If the service connection success is not detected, the controller 200 proceeds to step 407 to perform a corresponding function (eg, service connection attempt).

On the other hand, when detecting the success of the service connection, the control unit 200 proceeds to step 403 to obtain the IMS registration information.

Here, the IMS registration information is information required when connecting with the heterogeneous network, and information of an access point (AP) of an IMS network (eg, service set identifier (SSID), security type, password information, etc.) ) And information necessary for access to the access point (eg, personal identification code (ID), password information, etc.).

Thereafter, the controller 200 stores the obtained IMS registration information in the memory unit 204 of the portable terminal. Here, the IMS information stored in the memory unit is information for enabling emergency call connection through the heterogeneous network in a state where the user information card 202 does not exist.

Thereafter, the controller 100 ends the present algorithm.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the scope of the following claims, but also by the equivalents of the claims.

As described above, when attempting to perform an emergency call connection using the multi-mode portable terminal according to the present invention, a network network supported by the portable terminal to perform the emergency call connection regardless of the network setting of the portable terminal. By searching for and performing the emergency call connection, when an emergency occurs, emergency call connection can be performed quickly.

Claims (17)

A method for performing an emergency call of a multi-mode portable terminal supporting at least two different network connections, the method comprising: Searching for a network supported by the portable terminal when an emergency call connection request is detected without a user information card; When searching for a heterogeneous network among the network networks supported by the portable terminal, accessing the heterogeneous network using the heterogeneous network registration information stored in the portable terminal, and then performing the emergency call connection; And searching for a mobile communication network among network networks supported by the portable terminal, performing the emergency call connection through the searched mobile communication network. The method of claim 1, When the emergency call connection request is detected while the user information card is present, checking whether heterogeneous network registration information exists in the user information card; If the heterogeneous network registration information does not exist, performing an emergency call connection through the mobile communication network; And if the heterogeneous network registration information exists, accessing the heterogeneous network using the heterogeneous network registration information, and then performing the emergency call connection. The method of claim 2, The mobile communication network, A method comprising at least one of a Global System for Mobile (GSM) network and a Universal Mobile Telecommunications System (UMTS) network. The method of claim 2, The heterogeneous network, And a wireless LAN (WLAN) environment. The method of claim 2, The user information card, The method may include at least one of a certificate, an electronic serial number (ESN) of a portable terminal, and a social security number. The method of claim 2, The heterogeneous network registration information, Information necessary for accessing the heterogeneous network includes at least one of AP information, a user ID, and a user password. delete delete delete An apparatus for performing an emergency call of a multi-mode portable terminal supporting at least two different network connections, the apparatus comprising: A first communication unit for communicating with a mobile communication network, A second communication unit for communicating with a heterogeneous network, A user information card for storing user information of the portable terminal; When detecting an emergency call connection request in the absence of the user information card, the network information that can be connected to the device is searched, and when the communication to the heterogeneous network is confirmed, the heterogeneous network registration information is stored. And a control unit for processing the emergency call connection after connecting to the heterogeneous network using the network. The method of claim 10, The control unit, And when the mobile communication network is found as a result of the search, processing to connect to the mobile communication network to perform the emergency call connection. The method of claim 10, The control unit, If the emergency call connection request is detected while the user information card is present, acquiring the heterogeneous network registration information from the user information card to access the heterogeneous network, and then performing the emergency call connection. Characterized in that the device. The method of claim 10, The control unit, And confirming the successful connection to the heterogeneous network, obtaining heterogeneous network registration information necessary for accessing the heterogeneous network, and storing the heterogeneous network registration information in a memory unit of the portable terminal. The method of claim 10, The mobile communication network, Apparatus comprising at least one of a Global System for Mobile (GSM) network and a Universal Mobile Telecommunications System (UMTS) network. The method of claim 10, The heterogeneous network, Device comprising a Wireless LAN (WLAN) environment. The method of claim 12, The user information card, Device, characterized in that it may include at least one of a certificate, a unique number (ESN: Electronic Serial Number) of the portable terminal, the social security number. The method of claim 13, The heterogeneous network registration information, And at least one of AP information, a user ID, and a user password.

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