KR101306306B1 - Network apparatus and terminal device, and control method thereof - Google Patents

Abstract

PURPOSE: A network device, a terminal device thereof and an operation method of the device are provided to complete a circuit switched (CS) authentication process and to commence a packet switched (PS) authentication process in a terminal. CONSTITUTION: A terminal transmission unit (330) transmits a message for completing an authentication process related to a voice service. A terminal reception unit (340) receives a commencement request related to a data service corresponding to the terminal device in a state not transmitting the message for completing the authentication process related to the voice service of the terminal transmission unit. A control unit (350) controls the terminal transmission unit to transmit the message for completing the authentication process related to the voice service to the terminal device before commencement of the authentication process related to the data service. [Reference numerals] (310) Transmitting unit; (320,347) Receiving unit; (330) Terminal transmitting/receiving unit; (340) Network transmitting/receiving unit; (345) Transmit unit; (350) Control unit

Description

NETWORK APPARATUS AND TERMINAL DEVICE, AND CONTROL METHOD THEREOF}

The present invention relates to a network device and a terminal device. More specifically, a voice service related CS authentication procedure is initiated and normally completed for a terminal device for which a voice service is requested in a heterogeneous network environment and the network connection is switched by CS fallback. If a situation in which the PS authentication procedure related to data service is initiated previously occurs, the base station transmits an L2 Ack to the terminal device before completing the PS authentication procedure, which normally completes the CS authentication process. The present invention relates to a network device and a terminal device and a method of operating the device.

Recently, operators often provide services based on multiple wireless technologies at the same time. In Korea, major operators are building and servicing networks by introducing WCDMA, CDMA, WiBro and WLAN (WiFi) technology, which is the nearest wireless network. In addition, LTE (Long Term Evolution) network is actively being introduced recently.

In addition, introduction of a terminal (LTE terminal) capable of accessing an LTE network and using a data service is accelerating. The LTE terminal is capable of access to the existing network (WCDMA) as well as the LTE network.

Thus, the current LTE terminal, when using the data service in the region (Wlay) overlay the WCDMA network and LTE network (Overlay) can access the LTE network to use a faster data service.

When the voice service (eg, a call) is requested while accessing the LTE network and using the data service as described above, the LTE terminal is switched to the WCDMA network from the LTE network by the CSFB (Circuit Switched Fall Back) function and then switched to the WCDMA network. Voice service is used through the network.

At this time, when the LTE terminal uses the voice service in the WCDMA network by the CSFB function, after switching the connection to the WCDMA network, performs voice call connection for voice service through the WCDMA network, and at the same time, data service for data service through the WCDMA network Location registration procedure will be performed.

As described above, in the current method, when a voice call connection and a data service location registration procedure are simultaneously performed when switching to a WCDMA network by the CSFB function, a problem in that the voice call connection success rate is deteriorated is expected.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a voice service related CS authentication procedure for a terminal device for which voice service is requested in a heterogeneous network environment and switched to network connection by CS fallback. If a situation in which the PS authentication procedure related to data service is started before starting and completing normally occurs, the base station transmits an L2 Ack for completing the CS authentication procedure to the terminal device before starting the PS authentication procedure, and sends the CS to the terminal device. The PS authentication process can be started after the authentication process is normally completed. As the voice call connection and data service location registration procedures are performed at the same time, the success rate of voice call connection is reduced.

A transmitter for transmitting a message for completing an authentication procedure associated with a voice service according to a first aspect of the present invention for achieving the above object; A receiving unit for receiving a request for initiating an authentication procedure related to a data service; And the terminal apparatus at the receiving unit in a state in which the transmitter does not transmit a message for completing the authentication procedure related to the voice service to the terminal apparatus in response to the terminal apparatus for which the authentication of the voice service and the data service is requested. When a request for initiation of an authentication procedure related to the data service corresponding to the control unit is received, a control unit is configured to transmit a message for completing the authentication procedure related to the voice service to the terminal device before initiation of the authentication procedure related to the data service. Include.

Preferably, the control unit is configured to transmit a message for completing the authentication procedure related to the voice service to the terminal device before initiation of the authentication procedure related to the data service, and then the authentication associated with the received data service. A request for initiation of a procedure may be transmitted to the terminal device to initiate an authentication procedure related to the data service corresponding to the terminal device.

Preferably, the control unit may be configured to transmit a message N times to the terminal device to complete the authentication procedure related to the voice service.

A terminal apparatus according to the second aspect of the present invention for achieving the above object initiates an authentication procedure related to the voice service corresponding to a specific network for supporting a voice service and a data service, and performs an authentication procedure related to the data service. A voice service unit which receives a message for completing an authentication procedure related to the voice service before a start request is received; And a data service unit configured to receive a request for initiation of an authentication procedure related to the data service after the authentication process related to the voice service is completed by the voice service unit and to initiate an authentication procedure related to the data service.

A method of operating a network device according to a third aspect of the present invention for achieving the above object is, voice service authentication to initiate an authentication procedure associated with the voice service in response to a terminal device for which authentication of a voice service and a data service is requested. Initiation step; And when a request for initiating an authentication procedure related to the data service corresponding to the terminal apparatus is received without transmitting a message for completing the authentication procedure related to the disclosed voice service to the terminal apparatus, authentication related to the data service. And a message transmitting step of transmitting a message for completing the authentication procedure related to the voice service to the terminal device prior to the start of the procedure.

Preferably, after the message transmission step, the data service authentication to send a request to start the authentication procedure associated with the received data service to the terminal device to initiate an authentication procedure related to the data service corresponding to the terminal device. It may further comprise an initiation step.

Preferably, in the message transmitting step, the message for completing the authentication procedure associated with the voice service may be transmitted N times to the terminal device.

A method of operating a terminal device according to a fourth aspect of the present invention for achieving the above object is to initiate an authentication procedure associated with the voice service corresponding to a specific network for supporting a voice service and a data service, A voice service authentication step of receiving a message for completing an authentication procedure related to the voice service before a request for initiation of an associated authentication procedure is received; And a data service authentication step of receiving a request for initiation of an authentication procedure related to the data service after the authentication procedure related to the voice service is completed and initiating an authentication procedure related to the data service.

Accordingly, according to the network device and the terminal device of the present invention, and a method of operating the device, the CS authentication procedure related to voice service is started and normally completed for the terminal device switched to the network by CS Fallback in a heterogeneous network environment. If a data service related PS authentication procedure is initiated, the network device corresponding to the base station end transmits an L2 Ack, which normally completes the CS authentication procedure, to the terminal device before the PS authentication procedure is started. Regardless of the situation in which the procedure is initiated, the terminal device can first complete the CS authentication procedure and then start the PS authentication procedure. As a result, the voice call connection and the data service location registration procedure are simultaneously performed. The problem that the success rate is lowered can be solved.

1 is a block diagram illustrating a heterogeneous network system including a terminal apparatus and a network apparatus according to an exemplary embodiment of the present invention.
2 is a block diagram showing the configuration of a network apparatus according to a preferred embodiment of the present invention.
3 is a block diagram showing the configuration of a terminal apparatus according to an embodiment of the present invention.
4 is a flowchart illustrating an overall operation of a heterogeneous network system including a terminal device and a network device according to a preferred embodiment of the present invention.
5 is a flowchart illustrating a method of operating a network device according to an exemplary embodiment of the present invention.
6 is a flowchart illustrating an operation method of a terminal device according to an exemplary embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a diagram illustrating a heterogeneous network system including a terminal device and a network device according to a preferred embodiment of the present invention.

As shown in FIG. 1, the heterogeneous network system may include a first network 100, a second network 200, a terminal device 400 and a network device 300 according to the present invention.

Here, the first network 100 is a voice and data service support network that supports voice services such as circuit switched (CS) and data services such as packet switched (PS). For example, the first network 100 may include a WCDMA network. The network 200 is a data service dedicated network supporting a data service, for example, preferably includes an LTE network.

In addition, the terminal device 400 of the present invention includes an LTE network, that is, an LTE terminal capable of using a data service by accessing a second network 200, and furthermore, a WCDMA network, that is, a first network 100 and an LTE network. That is, the second network 200 may include a terminal connected to any one of the networks and using at least one of a voice service and a data service.

The terminal device 400, if a voice service (eg, a call) is requested while connected to the LTE network, that is, the second network 200, the second network 200 by the CSFB (Circuit Switched Fall Back) function A connection is made to a designated first network 100 supporting a voice service, that is, a WCDMA network.

Then, the terminal device 400 initiates an authentication procedure related to the voice service in response to the first network 100 switched by the CSFB function, and authenticates the data service in response to the first network 100. Before the request for initiation of the procedure is received, a message for completing the authentication procedure related to the voice service is received to complete the authentication procedure related to the voice service, and then a request for initiation of the authentication procedure related to the data service is received. The authentication procedure associated with the data service is started.

Here, CS Fallback refers to a case where a UE (User Equipment) serving in an LTE E-UTRAN (Evolved UMTS Terrestrial Radio Access Network) cell area is connected to a network in a Circuit Switched (CS) area, that is, a WCDMA Terrestrial Radio Access Network ) Cell area to use the service.

The network device 300 of the present invention corresponds to the terminal device 400 which is switched from the second network 200 to the first network 100 by the CSFB function, so that authentication of voice service and data service is requested. If a request for initiation of an authentication procedure related to a data service corresponding to the terminal apparatus 400 is received without transmitting a message for completing the authentication procedure related to the voice service to the terminal apparatus 400, the authentication associated with the data service is received. Prior to the start of the procedure, a message for completing the authentication procedure related to the voice service is transmitted to the terminal device 400.

Such a network device 300 is preferably located on the first network 100, and furthermore, the network device 300 is positioned to be included in a universal terrestrial radio access network (UTRAN) device, such as a base station device, constituting the first network 100. It is desirable to. Hereinafter, for convenience of description, the network device 300 will be described as being a base station device.

As described above, in the present invention, when the terminal device 400 is switched from another network to the current network, that is, the first network 100 by the CSFB function according to the voice service request, the voice call connection related to the voice service is performed. This is a method for improving the problem of deterioration of the existing voice call connection success rate caused by simultaneously performing the data service location registration procedure for performance and data service.

More specifically, the present invention, during the voice call connection associated with the voice service performed simultaneously between the terminal device 400 and the first network 100 and the data service location registration procedure for the data service, in particular the voice is performed at the same time It is a solution to solve the problems caused by service related authentication process and data service related authentication process.

Hereinafter, to describe the preferred embodiment of the present invention as a solution for solving the above-mentioned existing problems.

When the terminal device 400 is connected to the LTE network, that is, the second network 200, when a voice service (for example, a call) is requested, that is, when a call is made or an incoming call is received, the terminal device 400 switches to a circuit switched fall back (CSFB) function. As a result, the second network 200 switches to a designated first network 100 that supports voice service, that is, a WCDMA network.

Accordingly, the terminal device 400 is connected to the first network 100, that is, the WCDMA network, performs a voice call connection related to the requested voice service through the first network 100, and at the same time, the first network ( The data service location registration procedure through 100) will be performed.

That is, the terminal device 400 may be connected to devices located on the core network of the first network 100 by accessing the first network 100 designated by the CSFB function, that is, the network device 300 of the WCDMA network. .

That is, the terminal device 400 requests a voice call connection to the corresponding core network equipment (eg, MSC) of the first network 100 through the connected network device 300, and simultaneously registers the data service location. The core network equipment (eg, SGSN) of the first network 100 will be requested. This is the same as the operation of the existing terminal device.

Accordingly, in the core network equipment (eg, MSC) of the first network 100 that receives the voice call connection request from the terminal device 400, the authentication procedure related to the voice service is started in response to the terminal device 400. The request will be sent to the network device 300. Herein, a request for initiation of an authentication procedure related to a voice service, that is, a request for initiation of a CS authentication procedure, refers to a security mode command (CS).

Accordingly, the network device 300 transmits a request for initiating an authentication procedure related to the received voice service to the terminal device 400 to initiate an authentication procedure related to the voice service corresponding to the terminal device 400.

The terminal device 400 receives a request for initiating an authentication procedure related to a voice service, that is, a security mode command CS, initiates an authentication procedure related to a voice service for the first network 100, and the security corresponding thereto as before. Security mode complete (CS) will be transmitted to the network device (300).

Accordingly, the network device 300 transmits a security mode complete (CS) received from the terminal device 400 to the corresponding core network equipment (eg, MSC) of the first network 100, thereby providing a core network. Have the equipment (eg MSC) confirm that the authentication process is successful and return the L2 Ack message for the Security Mode Complete (CS) receipt.

The network device 300 transmits a message to the terminal device 400 to complete the authentication procedure related to the L2 Ack, that is, the voice service, returned from the core network equipment (eg, MSC).

Accordingly, the terminal device 400 receiving the L2 Ack, that is, the message for completing the authentication process related to the voice service, normally completes the voice service related authentication procedure for the first network 100.

On the other hand, in the core network equipment (eg, SGSN) of the first network 100 that receives the data service location registration request from the terminal device 400, the authentication procedure related to the data service is performed in response to the terminal device 400. The start request will be sent to the network device 300. Herein, a request for initiation of an authentication procedure related to a data service, that is, a request for initiation of an PS authentication procedure, refers to a security mode command (PS).

Accordingly, the network device 300 transmits a request for initiating an authentication procedure related to the received data service to the terminal device 400 to initiate an authentication procedure related to the data service corresponding to the terminal device 400.

The terminal device 400 receives a request for initiating an authentication procedure related to the data service, that is, a security mode command PS, initiates an authentication procedure related to the data service for the first network 100, and the security corresponding thereto as before. The mode complete (Security Mode Complete, PS) will be transmitted to the network device 300.

At this time, the terminal device 400 connected to the first network 100 by the CSFB function simultaneously performs the voice call connection related to the voice service and the data service location registration procedure for the data service with respect to the first network 100. In this case, before the L2 Ack according to the voice service related authentication procedure described above is received by the terminal device 400, a request for initiation of an authentication procedure related to the data service, that is, a Security Mode Command (PS) is first performed. A situation that is received by the terminal device 400 may occur.

When this situation occurs, the terminal device 400, the security mode command (CS), security mode for the authentication process associated with the corresponding core network equipment (eg, MSC) and voice service of the first network 100 Although the actual authentication process is normally processed by receiving / transmitting Security Mode Complete (CS), the terminal device 400 does not receive the L2 Ack and requests for initiation of an authentication process related to another authentication process, that is, a data service. Upon receiving and initiating, the authentication related to the voice service is confirmed as a failure, and a Security Mode Failure (CS) is transmitted to the core network equipment (eg, MSC).

Accordingly, the network device 300 of the present invention, before the L2 Ack according to the voice service related authentication procedure is received by the terminal device 400, a request for initiation of an authentication procedure related to the data service, that is, a security mode command (Security Mode Command, The PS is not first received by the terminal device 400.

That is, the network device 300 corresponds to the terminal device 400 which is switched from the second network 200 to the first network 100 by the CSFB function so that authentication of voice service and data service is requested. As shown in FIG. 2, security mode commands (CS) and security mode complete (CS) for authentication procedures related to voice services are received / transmitted.

Thereafter, the network device 300 does not transmit a message for completing the authentication process related to the voice service, that is, the L2 Ack to the terminal device 400, but the authentication procedure related to the data service corresponding to the terminal device 400. Check if the start request is received.

In other words, the network apparatus 300 transmits a security mode complete (CS) received from the terminal apparatus 400 to a corresponding core network equipment (eg, MSC) of the first network 100 to perform a core network. The network device 300 itself did not send the L2 Ack to the terminal device 400 because the L2 Ack was not returned from the device (eg, the MSC), or the L2 Ack was returned from the core network device (eg, the MSC). In the state where the device 300 itself has not yet transmitted to the terminal device 400, an authentication procedure related to the data service corresponding to the terminal device 400 from the corresponding core network equipment (eg, SGSN) of the first network 100. Initiation request of the security mode command (Security Mode Command, PS) is to check if it is received.

Accordingly, when the network device 300 determines that a security mode command corresponding to the terminal device 400 is received without transmitting the L2 Ack to the terminal device 400, the network device 300 receives the received L2 Ack. Since the Security Mode Command (PS) is not directly transmitted to the terminal device 400, the start of the authentication procedure related to the data service for the terminal device 400 is delayed, and the L2 Ack is first transmitted to the terminal device 400. To send.

In this case, the network device 300 may previously hold or generate the L2 Ack and transmit the generated L2 Ack to the terminal device 400, and may transmit the L2 Ack to the terminal device 400 a specified N times in succession.

As described above, the network device 300 can solve the problem that the terminal device 400 does not receive the L2 Ack due to an unstable network environment from the configuration in which the L2 Ack is transmitted N times to the terminal device 400.

Then, the network device 300, after transmitting the L2 Ack associated with the voice service to the terminal device 400 before the start of the authentication procedure associated with the data service as described above, the network device 300 delayed without transmitting to the terminal device 400 A request for initiation of an authentication procedure related to a data service, that is, a security mode command (PS) is transmitted to the terminal device 400 to initiate an authentication procedure related to a data service corresponding to the terminal device 400.

Accordingly, the terminal device 400 receives and transmits a security mode command (CS) and a security mode complete (CS) for an authentication procedure related to a voice service, and processes the actual authentication procedure normally. After the security mode command (PS) is received in the core network, even if a security mode command (PS) for initiating a new authentication procedure, that is, a data service related authentication procedure, is generated before the L2 Ack is received. Received, the voice service related authentication procedure can be completed normally.

After the authentication procedure related to the voice service is normally completed, the terminal device 400 receives a security mode command (PS) for initiation of the authentication procedure related to the data service and starts the authentication procedure related to the data service. can do.

Hereinafter, the network device 300 according to the present invention will be described in more detail with reference to FIG. 2.

The network device 300 according to the present invention includes a transmitter 310 for transmitting a message for completing an authentication procedure related to a voice service, a receiver 347 for receiving a request for initiation of an authentication procedure related to a data service, In response to the terminal device 400 requesting authentication of the voice service and the data service, the transmitter 310 does not transmit a message for completing the authentication procedure related to the voice service to the terminal device 400. When the receiving unit 347 receives a request for initiating an authentication procedure related to the data service corresponding to the terminal device 400, a message for completing the authentication procedure related to the voice service before initiation of an authentication procedure related to the data service. It includes a control unit 350 to transmit to the terminal device 400.

Here, the terminal device 400 is preferably the terminal device 400 connected to the first network 100 from the second network 200 by the CSFB function.

In addition, the network device 300 according to the present invention, the receiving unit for receiving a message including a request for initiation of the authentication procedure associated with the data service from the core network equipment (eg MSC, SGSN) of the first network 100 ( In addition to the 347, a network transmitter / receiver 340 including a transmitter 345 for transmitting a message to core network equipment (eg, MSC, SGSN) of the first network 100 is provided.

In addition, the network device 300 according to the present invention receives a message from the terminal device 400 in addition to the transmitting unit 310 for transmitting a message including a message for completing the authentication procedure related to the voice service to the terminal device 400. Including a receiving unit 320 is provided with a terminal transmitting and receiving unit 330.

The control unit 350 corresponds to the terminal device 400 for which the voice service and the data service are authenticated, and transmits a message for the transmitting unit 310 to complete an authentication procedure related to the voice service. If the reception unit 347 receives a request for initiating an authentication procedure related to the data service corresponding to the terminal device 400 without transmitting the message, the authentication unit related to the voice service prior to the initiation of the authentication procedure related to the data service. A message for completing the procedure is transmitted to the terminal device 400.

The controller 350 transmits a message for completing the authentication procedure related to the voice service to the terminal device 400 before starting the authentication procedure related to the data service. A request for initiation of a related authentication procedure is transmitted to the terminal device 400 to initiate an authentication procedure related to the data service corresponding to the terminal device 400.

In more detail, the control unit 350 is connected to the terminal device 400 which is connected to the first network 100 from the second network 200 by the CSFB function, and is connected to the terminal device through the receiver 320. When the voice call connection request related to the voice service and the data service location registration request related to the voice service are received from the 400, the received network call connection request and the data service location registration request are transmitted through the transmission unit 345. 100 can be transmitted to the corresponding core network equipment (eg SGSN).

Accordingly, the control unit 350, the CS request from the corresponding core network equipment (eg, MSC) of the first network 100 receiving the voice call connection request from the terminal device 400, the request for initiation of authentication procedures related to the voice service, that is, CS A security mode command CS is received as a request for initiation of an authentication procedure, and it is transmitted to the terminal device 400.

Accordingly, the control unit 350 transmits a request for initiation of an authentication procedure related to the received voice service, that is, a security mode command CS to the terminal device 400 to perform an authentication procedure related to the voice service corresponding to the terminal device 400. Let's start.

Thereafter, the control unit 350 receives the security mode completion (CS) transmitted from the terminal device 400 that receives the security mode command (CS), and the corresponding core network equipment (eg, MSC) of the first network 100. In this case, the core network equipment (eg, MSC) confirms that the authentication process is normally performed, and returns a message on receiving the Security Mode Completion (CS), that is, L2 Ack.

In response to the message for completing the authentication procedure related to the L2 Ack, that is, the voice service, from the core network equipment (eg, MSC), the control unit 350 transmits the returned L2 Ack to the terminal device 400.

Here, the controller 350 starts the authentication procedure related to the data service corresponding to the terminal apparatus 400 without transmitting a message for completing the authentication procedure related to the voice service, that is, the L2 Ack to the terminal apparatus 400. Check that the request is received.

In other words, the control unit 350 transmits the security mode completion (CS) received from the terminal device 400 to the corresponding core network equipment (eg, MSC) of the first network 100 to perform core network equipment (eg, MSC). ), The network device 300 itself did not transmit the L2 Ack to the terminal device 400 or the L2 Ack was returned from the core network equipment (eg, MSC), but the control unit 350 itself In the state of not transmitting to the terminal device 400, a request for initiation of an authentication procedure related to a data service corresponding to the terminal device 400 from a corresponding core network device (eg, SGSN) of the first network 100, that is, a security mode. It is to check whether the command PS is received.

Accordingly, when it is confirmed that the security mode command PS corresponding to the terminal device 400 is received without transmitting the L2 Ack to the terminal device 400, the control unit 350 receives the received security mode command PS. ) Is not immediately transmitted to the terminal device 400, thus delaying the start of the authentication procedure related to the data service for the terminal device 400, and first transmitting the L2 Ack to the terminal device 400.

At this time, the control unit 350 may hold or generate an L2 Ack in advance and transmit the L2 Ack to the terminal device 400, and may transmit the L2 Ack to the terminal device 400 a specified N times in succession.

Then, the control unit 350, after transmitting the L2 Ack associated with the voice service to the terminal device 400 before the start of the authentication procedure associated with the data service as described above, the data delayed without transmitting to the terminal device 400 A request for initiation of an authentication procedure related to a service, that is, a security mode command PS is transmitted to the terminal device 400 to initiate an authentication procedure related to a data service corresponding to the terminal device 400.

Thereafter, the control unit 350 receives the security mode completion PS transmitted from the terminal device 400 that receives the security mode command PS, and the corresponding core network equipment (eg, SGSN) of the first network 100 is received. To send).

Hereinafter, a configuration of a terminal device according to the present invention will be described with reference to FIG. 3.

The terminal device 400 according to the present invention initiates an authentication procedure related to the voice service in response to the first network 100 for supporting a voice service and a data service, and requests to start an authentication procedure related to the data service. The voice service unit 420 receives a message for completing the authentication process related to the voice service before receiving the voice service, and after the authentication process related to the voice service is completed in the voice service unit 420, And a data service unit 430 for receiving a request for initiating a related authentication procedure and initiating an authentication procedure related to the data service.

In addition, the terminal device 400 according to the present invention may further include an access switching unit 410 performing a CSFB function.

The connection switching unit 410 performs connection switching from the network being accessed to the specific network designated by the voice service request.

That is, the connection switching unit 410 performs a CSFB function when a voice service (eg, a call) is requested in the state of being connected to the LTE network, that is, the second network 200, that is, when a call is made or received. 2, the network 200 performs connection switching to a designated first network 100 that supports voice service, that is, a WCDMA network. The network connection switching method of the connection switching execution unit 410 may adopt various types of methods such as connection switching, handover, and transition by the existing CSFB function, and detailed description thereof will be omitted.

In addition, a predetermined function unit (not shown) of the terminal device 400 connects the voice call connection to the corresponding core network equipment of the first network 100 through the first network 100 connected to the network device 300. Example: MSC), and at the same time request the data network location registration to the corresponding core network equipment (eg, SGSN) of the first network (100). This is the same as the operation of the existing terminal device. Of course, the voice call connection request may be performed by the voice service unit 420, and the data service location registration request may be performed by the data service unit 430.

The voice service unit 420 receives a request for initiation of an authentication procedure related to a voice service transmitted through a network device 300 from a core network device (eg, MSC), that is, a security mode command (CS), and receives the first network 100. It will start the voice service related authentication procedure for), and will transmit the corresponding security mode completion (CS) to the core network equipment (eg, MSC) through the network device 300 as before.

Then, the voice service unit 420 receives the message for completing the authentication process related to the voice service, that is, the L2 Ack, and normally completes the voice service related authentication procedure before the request for initiation of the authentication procedure related to the data service is received. do.

After the authentication process related to the voice service is normally completed in the voice service unit 420, the data service unit 430 receives a request for initiation of an authentication procedure related to the data service, that is, a security mode completion (PS), to associate with the data service. Start the authentication process.

As described above, according to the network device and the terminal device according to the present invention, a data service before the voice service related CS authentication procedure is started and completed normally for the terminal device switched to the network by CS Fallback in a heterogeneous network environment. If a situation in which the relevant PS authentication procedure is initiated occurs, the network device corresponding to the base station end sends an L2 Ack for completing the CS authentication procedure to the terminal device before the PS authentication procedure starts, and the PS authentication procedure related to data service starts. Regardless of the situation, the terminal device can start the PS authentication process after completing the CS authentication process normally, and thus the voice call connection success rate decreases as the voice call connection and data service location registration procedures are performed at the same time. Can solve the problem.

Hereinafter, an operation method of a network device and a terminal device according to the present invention will be described with reference to FIGS. 4 to 6.

First, referring to FIG. 4, an operation flow of a heterogeneous network system including the apparatuses of the present invention will be described.

When the terminal device 400 is connected to the LTE network, that is, the second network 200, when a voice service (for example, a call) is requested, that is, when a call is made or an incoming call is received, the terminal device 400 switches to a circuit switched fall back (CSFB) function. As a result, the second network 200 switches to the designated first network 100 supporting the voice service, that is, the WCDMA network (S5).

Accordingly, the terminal device 400 is connected to the first network 100, that is, the network device 300 as a WCDMA network, for example, a base station device (S10), and through the connected network device 300, a voice call connection is made first. Request the core network equipment (eg MSC) of the network 100 (S20), and at the same time request the corresponding core network equipment (eg SGSN) of the first network 100 (S30). . This is the same as the operation of the existing terminal device.

Accordingly, in the corresponding core network equipment (eg, MSC) of the first network 100 that receives the voice call connection request from the terminal device 400, the terminal device 400 corresponds to the terminal device 400 for authentication procedure related to the voice service. The security mode command CS is transmitted to the network device 300, and the network device 300 transmits the security mode command CS to the terminal device 400 (S40).

The terminal device 400 receives a request for initiating an authentication procedure related to a voice service, that is, a security mode command CS, initiates an authentication procedure related to a voice service for the first network 100, and the security corresponding thereto as before. The mode completion (CS) is transmitted to the network device 300, whereby the network device 300 will transmit the security mode completion (CS) to the core network equipment (eg, MSC) (S50).

Accordingly, the core network equipment (eg, MSC) of the first network 100 that has received the security mode completion (CS) from the terminal device 400 confirms that the voice service related authentication procedure is normally processed and completes the security mode. (Security Mode Complete, CS) It is common to return a message for reception, that is, an L2 Ack, and the network device 300 transmits the L2 Ack to the terminal device 400. Accordingly, the terminal device 400 receiving the L2 Ack, that is, the message for completing the authentication procedure related to the voice service, normally completes the voice service related authentication procedure for the first network 100.

At this time, the terminal device 400 connected to the first network 100 by the CSFB function simultaneously performs the voice call connection related to the voice service and the data service location registration procedure for the data service with respect to the first network 100. In this case, before the L2 Ack according to the voice service related authentication procedure described above is received by the terminal device 400, a request for initiation of an authentication procedure related to the data service, that is, a Security Mode Command (PS) is first performed. A situation that is received by the terminal device 400 may occur.

Therefore, after performing step S50, the network device 300 performs a data service corresponding to the terminal device 400 without transmitting a message for completing the authentication process related to the voice service, that is, the L2 Ack to the terminal device 400. When the request for the start of the authentication procedure associated with the security mode command PS is received (S60), the received security mode command PS is not directly transmitted to the terminal device 400, so that the data service for the terminal device 400 is performed. Delaying the start of the authentication procedure associated with the first, and first transmits the L2 Ack to the terminal device (400) (S70).

At this time, the network apparatus 300 may transmit the L2 Ack to the terminal apparatus 400 a specific N times in succession.

In operation S80, the network apparatus 300 transmits a security mode command PS related to the data service, which has been delayed without being transmitted to the terminal apparatus 400, to the terminal apparatus 400 (S80). The authentication procedure associated with the data service corresponding to 400 is started.

The terminal device 400 receives the security mode command (CS) related to the data service, initiates a data service related authentication procedure for the first network 100, and completes the security mode completion (PS) corresponding thereto. Transmitting to the network device 300, the network device 300 will transmit the security mode completion (PS) to the core network equipment (for example, SGSN) (S90).

Hereinafter, a method of operating a network device according to the present invention will be described with reference to FIG. 5.

In the operation method of the network apparatus according to the present invention, the terminal apparatus 400 connected to the first network 100 from the second network 200 by the CSFB function is connected (S100).

The method of operating a network device according to the present invention includes receiving a voice call connection request and a data service when a voice call connection request relating to a voice service and a data service location registration request relating to the voice service are received from the terminal device 400. The location registration request is transmitted to the corresponding core network equipment (eg, SGSN) of the first network 100 (S110).

Accordingly, in the method of operating a network device according to the present invention, an authentication procedure related to a voice service from a corresponding core network device (eg, MSC) of the first network 100 that receives a voice call connection request from the terminal device 400. The security mode command (CS) is received as a start request of the CS authentication process, that is, a request for initiation of the CS authentication procedure, and is transmitted to the terminal device 400 (S120). Accordingly, the method of operating a network device according to the present invention transmits a security mode command CS related to a received voice service to the terminal device 400 to initiate an authentication procedure related to the voice service corresponding to the terminal device 400. Do it.

Thereafter, the operation method of the network apparatus according to the present invention receives the security mode completion (CS) transmitted from the terminal device 400 that receives the security mode command (CS), and this is the core network of the first network (100). By transmitting to the equipment (eg MSC) (S130), the core network equipment (eg MSC) confirms that the authentication procedure is normally processed, and returns a message for receiving the Security Mode Completion (CS), that is, the L2 Ack.

Accordingly, in the method of operating a network device according to the present invention, when a message for completing an authentication procedure related to an L2 Ack, that is, a voice service, is returned from a core network device (eg, MSC), the returned L2 Ack is sent to the terminal device 400. Will be transmitted (S140).

At this time, the operation method of the network device according to the present invention, without the L2 Ack associated with the voice service to the terminal device 400, the request for initiation of the authentication procedure associated with the data service corresponding to the terminal device 400, that is, security It is checked whether the mode command PS is received (S150).

Accordingly, in the method of operating the network device according to the present invention, when it is confirmed that the security mode command PS corresponding to the terminal device 400 is received without transmitting the L2 Ack to the terminal device 400, the received method is received. Since the security mode command PS is not immediately transmitted to the terminal device 400, the start of the authentication procedure related to the data service for the terminal device 400 is delayed, and the L2 Ack is first transmitted to the terminal device 400 ( S160). In this case, the method of operating the network apparatus according to the present invention may transmit the L2 Ack to the terminal apparatus 400 a specific N times in succession.

In addition, the operating method of the network apparatus according to the present invention transmits a security mode command (PS) related to a data service which has been delayed without transmitting to the terminal apparatus 400 to the terminal apparatus 400 to correspond to the terminal apparatus 400. To initiate the authentication procedure associated with the data service (S170).

Thereafter, the operation method of the network apparatus according to the present invention receives the security mode completion (PS) transmitted from the terminal apparatus 400 that receives the security mode command (PS), and the core network of the first network 100 is received. Transmission to the equipment (eg SGSN) (S180).

Of course, the operating method of the network device according to the present invention, the security mode command (PS) associated with the data service corresponding to the terminal device 400 is received in the state that the L2 Ack associated with the voice service to the terminal device 400 is received. In operation S190, the security mode command PS is transmitted to the terminal device 400 to initiate an authentication procedure related to the data service corresponding to the terminal device 400.

Hereinafter, a method of operating the terminal device of the present invention will be described with reference to FIG. 6.

In the method of operating a terminal device according to the present invention, when a voice service (for example, a call) is requested in a state of being connected to an LTE network, that is, a second network 200, that is, when a call is made or an incoming call is performed, the CSFB function is performed. In operation S200, the second network 200 switches the access to the designated first network 100 that supports voice service, that is, the WCDMA network.

In addition, the operating method of the terminal device according to the present invention, through the connected first network 100, for example, the network device 300, the voice call connection to the corresponding core network equipment (eg, MSC) of the first network 100 At the same time, the data service location registration will be requested to the corresponding core network equipment (eg, SGSN) of the first network 100 (S210).

A method of operating a terminal device according to the present invention includes receiving a request for initiation of an authentication procedure related to a voice service transmitted through a network device 300 from a core network device (for example, an MSC), that is, a security mode command (CS). The voice service related authentication procedure for the network 100 will be initiated, and the security mode completion (CS) corresponding thereto will be transmitted to the core network equipment (eg, MSC) through the network apparatus 300 (S220). .

In operation S230, the terminal apparatus receives a L2 Ack associated with a voice service and normally completes a voice service related authentication procedure before a request for initiation of an authentication procedure related to a data service is received.

After the authentication procedure related to the LS voice service is normally completed, the authentication procedure related to the data service is started by receiving a request for initiation of the authentication procedure related to the data service, that is, a security mode completion (PS) (S240).

As described above, according to the operation method of the network device and the operation method of the terminal device according to the present invention, CS authentication procedure related to voice service is initiated and normally performed for the terminal device switched to the network by CS fallback in a heterogeneous network environment. If a situation in which the PS authentication procedure related to data service is started before completion is completed, the network device corresponding to the base station end transmits an L2 Ack for completing the CS authentication procedure to the terminal device before the PS authentication procedure is started. Irrespective of the situation in which the relevant PS authentication procedure is initiated, the terminal device can start the PS authentication procedure after completing the CS authentication procedure normally, so that the voice call connection and data service location registration procedure are simultaneously performed. Resolves the problem of poor voice call success rate There.

The method of operating a network device and the method of operating a terminal device according to an embodiment of the present invention may be implemented in the form of program instructions that can be executed by various computer means and recorded in a computer readable medium. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. The program instructions recorded on the medium may be those specially designed and constructed for the present invention or may be available to those skilled in the art of computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic disks, such as floppy disks. Magneto-optical media, and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like. The hardware device described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

According to the network device and the terminal device according to the present invention and a method of operating the device, the PS service related PS authentication process is initiated and normally completed before the voice service related CS authentication procedure is started for the terminal device switched to the network by CS Fallback. When the authentication procedure is initiated, the network device corresponding to the base station end transmits an L2 Ack, which normally completes the CS authentication procedure, to the terminal device before the PS authentication procedure is started, and the PS authentication procedure related to data service is started. Regardless of this problem, the terminal device can start the PS authentication process after the CS authentication process is completed normally, so that the voice call connection success rate decreases as the voice call connection and data service location registration procedures are performed at the same time. In order to overcome the limitations of existing technologies, The invention has industrial applicability because not only the use of related technology but also the possibility of marketing or sales of the applied device is not only sufficient but also practically obvious.

300: network device
330: terminal transmitter and receiver 340: network transmitter and receiver
350: control unit

Claims (8)

A transmitter for transmitting a message for completing an authentication procedure associated with a voice service;
A receiving unit for receiving a request for initiating an authentication procedure related to a data service; And
In response to a terminal device for which authentication of the voice service and the data service is requested, the receiving unit transmits a message to the terminal device without transmitting a message for completing the authentication procedure related to the voice service to the terminal device. And a control unit which, upon receiving a request for initiating an authentication procedure related to the corresponding data service, transmits a message for completing the authentication procedure related to the voice service to the terminal device before initiation of the authentication procedure related to the data service. Network device, characterized in that. The method of claim 1,
The control unit,
After transmitting a message for completing the authentication procedure related to the voice service to the terminal device prior to the start of the authentication procedure related to the data service, the terminal device sends a request to start the authentication procedure related to the received data service. And initiate an authentication procedure associated with the data service corresponding to the terminal device. The method of claim 1,
The control unit,
And a message for transmitting the message for completing the authentication process related to the voice service to the terminal device N times. Initiating an authentication procedure related to the voice service in response to a specific network for supporting a voice service and a data service, and completing the authentication procedure related to the voice service before a request for initiation of an authentication procedure related to the data service is received. Voice service unit for receiving a message for; And
After the authentication process associated with the voice service is completed in the voice service unit, the terminal device characterized in that it comprises a data service unit for receiving a request for the start of the authentication process related to the data service to initiate the authentication process related to the data service. . A voice service authentication start step of initiating an authentication procedure related to the voice service in response to a terminal device for which voice service and data service authentication are requested; And
If a request for initiation of an authentication procedure related to the data service corresponding to the terminal apparatus is received without transmitting a message for completing the authentication procedure related to the initiated voice service to the terminal apparatus, the authentication procedure related to the data service is received. And a message transmitting step of transmitting a message for completing the authentication procedure related to the voice service to the terminal device prior to the start of the voice service. The method of claim 5, wherein
After the message transmission step, further comprising a data service authentication start step for transmitting a request to start the authentication procedure associated with the data service to the terminal device to initiate an authentication procedure related to the data service corresponding to the terminal device. Operating method of a network device comprising a. The method of claim 5, wherein
The message sending step,
And transmitting a message for completing the authentication procedure related to the voice service to the terminal device N times. Initiating an authentication procedure related to the voice service in response to a specific network for supporting a voice service and a data service, and completing the authentication procedure related to the voice service before a request for initiation of an authentication procedure related to the data service is received. Voice service authentication step of receiving a message for; And
And a data service authentication step of receiving a request for initiating an authentication procedure related to the data service after the authentication procedure related to the voice service is completed and initiating an authentication procedure related to the data service. .

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