KR20150025893A - Method and apparatus for updating information of location - Google Patents

Abstract

The present invention relates to a method and an apparatus for updating location information. The method for updating location information comprises the following steps: transmitting an update location request message for a mobile equipment to a subscriber data management apparatus, wherein a handover of the mobile equipment from a packet switched domain of a first mobile communication network to a circuit switched domain of a second mobile communication network has been completed; receiving an insert subscriber data request message including a subscriber profile of the mobile equipment from the subscriber data management apparatus; transmitting an insert subscriber data response message including short message service (SMS) unsupported identification information for the mobile equipment in response to the insert subscriber data request message to the subscriber data management apparatus; and receiving an update location response message corresponding to the update location request message from the subscriber data management apparatus. Therefore, when location information of a mobile terminating subscriber is requested for an SMS, the subscriber data management apparatus can send back packed switched information and continuously provide the SMS to the mobile equipment, which has completed an SRVCC handover, through a packet switched domain based on the packet switched information.

Description

Field of the Invention [0001] The present invention relates to a location information update method,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a location information update method and apparatus, and more particularly, to a Voice over Long Term Evolution (VoLTE) system from a packet switched domain to a circuit switched domain for SRVCC (Single Radio Voice Call Continuity) To a location information update method and apparatus for providing a short message service to a mobile communication terminal device handed over to a circuit switched domain after handover of a call.

As is known, in 3GPP Release 8, EPC (Evolved Packet Core), which is a network architecture, is described as one of mobile communication systems. EPC is a set of network nodes for 3GPP LTE (Long Term Evolution) system. The EPC evolves the core network of the existing 3GPP system architecture to support Evolved-UMTS Terrestrial Radio Access Network (E-UTRAN), which is an evolved RAN, And has an efficient network structure that simplifies the network node. A wireless communication system including an EPC and an E-UTRAN may be referred to as an evolved packet system (EPS) and corresponds to an LTE mobile communication system currently in service in Korea.

Meanwhile, in the initial stage of establishing an LTE mobile communication system, a hybrid communication environment with a legacy network such as a WCDMA mobile communication system appears, and in such a communication environment, it is possible to connect to an LTE network and also to a WCDMA (Wideband Code Division Multiple Access) A dual mode mobile communication terminal device capable of connecting to the same legacy network can be operated. In the early stage of the LTE mobile communication service, a WCDMA mobile communication system was used to provide a voice communication service to a dual mode mobile communication terminal, and an LTE mobile communication system was used to provide a data communication service.

Unlike this, it is VoLTE service that uses LTE mobile communication system not only for data communication but also for voice communication. These VoLTE services are also called High Definition (HD) voice services. According to the VoLTE service, it is possible to provide a cleaner HD-class voice call service in case of voice call, and users can share contents such as map, music, news, photo while displaying the same screen as the other party in real time during a call .

However, since the service area of the LTE network is limited, there is a problem that the continuity of voice calls is not ensured in areas where the radio wave environment is poor, such as leaving the limited area or the service cell border area. In order to solve this problem, there is a tendency to provide voice call continuity in cooperation with a circuit switched network. At this time, a Single Radio Voice Call Continuity (SRVCC) function that provides continuity with one radio resource is provided so that the mobile communication terminal apparatus does not need to access all of the radio resources provided by the packet switched network and the circuit network. SRVCC is a technology that handover voice traffic to the circuit network in order to provide call continuity when entering the LTE electric field during a VoLTE call.

However, a mobile communication terminal device handed over from a packet-switched domain to a circuit-switched domain by the SRVCC function can guarantee call continuity even with one radio resource, while a short message service It can not be provided.

In order to solve this problem, a short message transmission function is provided to a circuit switching node such as an MSC server (or an enhanced MSC) that provides a session data protocol for voice and video for the SRVCC function A short message service can be continuously provided even after the SRVCC handover.

However, in order to add a short message transmission function, hardware and software such as an MSC server must be upgraded to a great extent, which has a problem of causing a lot of system construction costs.

Korean Patent Publication No. 10-2013-0064709, published on June 18, 2013.

According to the embodiment of the present invention, when the location information of the handover mobile communication terminal device is updated after performing the SRVCC handover processing of the VoLTE call from the packet switched domain to the circuit switched domain, And provides a location information update method and apparatus that can provide a short message service through a packet switched domain by informing the unsupported state.

The problems to be solved by the present invention are not limited to those mentioned above, and another problem to be solved can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a method for updating location information of a mobile communication terminal device that has completed handover from a packet switched domain of a first mobile communication network to a circuit switched domain of a second mobile communication network, Receiving a subscriber data insertion request message including the subscriber profile of the mobile communication terminal device from the subscriber data management device; and transmitting, in response to receiving the subscriber data insertion request message, The method comprising: transmitting a subscriber data insertion response message including the subscriber identification information of the short message service to the subscriber data management device to the subscriber data management device; and transmitting, from the subscriber data management device, Receiving messages May include steps.

According to another aspect of the present invention, there is provided an apparatus for updating location information, comprising: a location information update request message for a handover-completed mobile communication terminal device from a packet switched domain of a first mobile communication network to a circuit switched domain of a second mobile communication network; A subscriber data insertion request message including a subscriber profile of the mobile communication terminal apparatus and a location information update request message including a subscriber data insertion request message including a subscriber profile of the mobile communication terminal apparatus, And a location information update request message to the subscriber data management device when the subscriber data insertion request message is received from the subscriber data management device The subscriber And a message controller for controlling the data reception response message to be transmitted to the subscriber data management device so that the message receiver receives the location information update response message.

According to the embodiment of the present invention, when the location information of the handover mobile communication terminal device is updated after performing the SRVCC handover processing of the VoLTE call from the packet switched domain to the circuit switched domain, When the called subscriber location information is requested for the SMS message service, the subscriber data management device can return the packet switched information because it indicates the unsupported state.

Then, it is possible to continuously provide the short message service through the packet exchange domain based on the packet exchange information to the SRVCC handover-enabled mobile communication terminal device.

Therefore, in order to support the short message transmission function, only the service non-support identification information is added without significantly upgrading the hardware and software such as the MSC server, so that the system construction cost for the short message service is reduced.

1 is a network configuration diagram of a mobile communication service system capable of employing a location information updating apparatus according to an embodiment of the present invention.
2 is a detailed configuration diagram of a location information updating apparatus according to an embodiment of the present invention.
3 is a flowchart illustrating a method for updating location information according to an embodiment of the present invention.
4 is a flowchart illustrating an SRVCC handover and a text message service process of a VoLTE call by a mobile communication service system employing a location information updating apparatus according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions in the embodiments of the present invention, which may vary depending on the intention of the user, the intention or the custom of the operator. Therefore, the definition should be based on the contents throughout this specification.

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

1 is a network configuration diagram of a mobile communication service system capable of employing a location information updating apparatus according to an embodiment of the present invention. 1 illustrates a case where a WCDMA mobile communication network is operated as a legacy network, the legacy network is not limited thereto. For example, other asynchronous mobile communication networks such as GSM (Global System for Mobile) and other synchronous mobile communication networks such as CDMA2000 and the like can be mixed with LTE mobile communication network.

As shown in the figure, the mobile communication terminal 300 can be operated in a mixed environment of an LTE mobile communication network providing a packet-based voice service and a WCDMA mobile communication network providing a circuit-based voice service. The mobile communication terminal 300 includes a service area 111 of the eNodeB 110 serving as a base station of the LTE mobile communication network and a service of the NodeB 210 serving as a base station constituting a WCDMA mobile communication network The service overlap area included in the area 211 can be operated. The mobile communication terminal device 300 is located in one of a plurality of cells existing in the service area 111 of the eNodeB 110 and is provided with a mobile communication service and transmits the received electric field to the eNodeB 110, Lt; / RTI > For example, the mobile communication terminal device 300 can be implemented in various forms such as a smart phone, a notepad, and a tablet computer.

(eNodeB) 110, an MME (Mobility Management Entity) 120, an HSS (Home Subscriber Server) 130, a SGW (Serving Gateway) 140, a PGM (Packet Data Network Gateway) 150, Rule Function) 160 can constitute an LTE mobile communication network.

The eNodeB 110 communicates with the mobile communication terminal device 300 to serve as a base station for ensuring mobility. The eNodeB 110 may include a radio bearer control, a radio admission control, a connection mobility control, a dynamic resource allocation to the mobile communication terminal 300, And performs the same radio resource management function. In addition, IP header compression and decryption of user data streams, routing of user plane data to SGW 140, scheduling and transmission of paging messages, scheduling and transmission of broadcast information, And performs measurement and measurement report settings for mobility and scheduling.

The eNodeB 110 is connected to the eNodeB 110 and the NodeB 210 via a radio access network that provides a relatively higher voice communication quality than the eNodeB 110 and the NodeB 210, Can be determined. In particular, it is possible to determine the handover of the VoLTE call from the packet switched domain to the circuit switched domain based on the electric field measurement report provided from the mobile communication terminal device 300.

The MME 120 takes charge of signal control between the eNodeB 110 and the SGW 140 and determines the routing for the transmission data of the mobile communication terminal 300. [ The MME 120 performs paging message distribution to the eNodeB 110, non-access spectrum (NAS) signaling, intra-network handover control, tracking area list management, and the like. In addition, the MME 120 performs selection of the SGW 140 and the PGW 150, selection and change of the MME 120 for handover, terminal authentication, and the like. The MME 120 may be configured to process a control signal when there is a combination request from the mobile communication terminal 300 or another network node such as the PGW 150 or the SGW 140, And receives the subscriber profile information, authentication, and location related data from the HSS 130 to configure an Evolved Packet System bearer or an IP tunnel, And performs mobility management and the like.

The HSS 130 is a network node including a data base including subscriber information for the LTE mobile communication network and stores subscriber profile information, authentication and location related data.

The SGW 140 is a user plane node that performs session control for processing payload traffic according to a set session. U-interface with the eNodeB 110, supports handoff in the 3GPP, sets up the EPS bearer with the PGW 150, and delivers PDU (Packet Data Unit) using tunneling. The SGW 140 selects the PGW 150 based on the subscriber profile, and generates billing data for mutual settlement with the PGW of the home network when the call is an inbound roaming call.

The PGW 150 is a user plane node that assigns an IP of the mobile communication terminal 300 and performs session control in cooperation with an external Internet network and a non-3GPP network. Maintains routing information with the SGW 140 and the external network for packet service, and performs tunneling and IP routing functions. In addition, the PDU is delivered to the SGW 140 and the external network. The PGW 150 performs a charging process in the case of a local call.

The PCRF 160 provides a dynamic QoS (Quality of Service) and a charging rule according to a service data flow to perform a communication policy and a charging process in a communication network.

A Node B 210, an RNC 220, a Serving General Packet Radio Service Support Node 230, a Mobile Switching Center (MSC) 240, a Home Location Register (HLR) 250, a CGS A gateway general packet radio service support node (GGSN) 270, an MSC server 280 and an SMSC (Short Message Service Center) 290 may constitute a WCDMA mobile communication network. Here, the Node B 210 and the RNC 220 correspond to a radio access network area, the MSC 240 and the CGS 260 correspond to a circuit switching core network, and the SGSN 230 and the GGSN 270 exchange packets. Corresponds to the core network.

The NodeB 210 secures a frequency used for connection with the mobile communication terminal devices 300 and ensures a stable connection with the mobile communication terminal devices 300.

The RNC 220 controls a plurality of NodeBs 210, allocates communication resources to each of the NodeBs 210, and performs a handover function. When the SRVCC handover for the VoLTE call is completed, the RNC 220 transmits a location reset completion message to the MSC 240.

The SGSN 230 is connected to a plurality of RNCs 220 to manage the mobility of the mobile communication device 300 and the packet session management. The SGSN 230 can perform IP routing, You can do the same interaction.

In particular, after the mobile communication terminal 300 has performed SRVCC handover from the packet-switched domain to the circuit-switched domain, the SGSN 230 transmits the packet-switched paths to the RNC 220 and the NodeB 210 according to a request from the SMSC 290. [ And transmits the short message to the mobile communication terminal device 300 through the short message.

The MSC 240 stores visitor location information, receives subscriber profile information, authentication and location related data from the HLR 250, and performs switching control for voice communication. The MSC 240 requests the RNC 220 of the radio access network area to perform location reconfiguration for the SRVCC handover when the MSC server 280 is requested to prepare for the SRVCC handover of the VoLTE call from the MSC server 280, When the location reset completion message is received, the MSC server 280 is notified that the SRVCC handover is completed.

The HLR 250 is a network node including a data base including subscriber information for a WCDMA mobile communication network, and stores subscriber profile information, authentication and location related data.

In particular, when the MSC server 280 updates the location information of the MSC 300 that has been handed over from the packet-switched domain to the circuit-switched domain through the SRVCC handover, the HLR 250 searches the mobile communication- If the SMSC 290 is informed of the unsupported state of the short message service, it provides packet switching information of the mobile communication terminal 300 to the SMSC 290 in the process of inquiring the location of the called subscriber.

The CGS 260 serves as a gateway for connecting the WCDMA mobile communication network and the general communication network, enabling communication with other communication systems connected to the general communication network, and serves as a gateway between the MSC 240 and the IMS.

The GGSN 270 directly connects with the IP network and serves as a gateway for connecting the IP domain and the PS domain of the WCDMA network. The GGSN 270 maintains routing information with the SGSN 230 and the external network, performs tunneling and IP routing Function.

The MSC server 280 provides a session data protocol for voice and video for the SRVCC function by the SRVCC AS 470. When the MME 120 requests handover from the packet switched domain to the circuit switched domain for the VoLTE call, the MSC server 280 requests the circuit switching core network of the WCDMA mobile communication network, which is a legacy network, to prepare for handover. When a response to the preparation for over is received, a session transfer start message for SRVCC handover is transmitted to the IMS after the connection with the MSC 240 is established.

In particular, the MSC server 280 may be equipped with a location information update apparatus (referenced 500 in FIG. 2) according to an embodiment of the present invention, or may interwork with a location information update apparatus (referenced 500 in FIG. 2) installed separately . After the MSC server 280 performs the SRVCC handover processing of the VoLTE call from the packet switched domain to the circuit switched domain, the MSC server 280 transmits the handover to the home location register 250 It is possible to provide a short message service targeting the mobile communication terminal device 300 through the packet switched domain by notifying the unsupported state of the short message service. Details of the components of the location information updating device (reference numeral 500 in FIG. 2) will be described below with reference to FIG.

The SMSC 290 provides the mobile communication terminal 300 with a short message service. The SMSC 290 provides a short message service through the circuit switched domain according to the general service flow. However, when the HLR 250 provides the packet exchange information in the process of inquiring the location of the called subscriber to the mobile communication terminal device 300 that has performed the SRVCC handover from the packet switched domain to the circuit switched domain, And provides the device 300 with a short message service.

(CSCF) 410, an HLR 420, a MGW 430, a MGCF (Media Gateway Control Function) 440, a TAS (Telephony Application Server) 450, a Multimedia Resource Function 460, and Service Centralization and Continuity Application Server (SCC AS) 470 can configure the IMS.

Here, the TAS 450 and the SCC AS 470 are servers for providing individual application services. The TAS 450 and the SCC AS 470 may be combined into a single server, which may be referred to as an AS (Application Server). It is possible to provide all application service functions in one AS, and it is also possible to provide application service functions according to respective functions in a plurality of ASs.

The CSCF 410 is an infrastructure system that performs call processing and performs basic functions for multimedia session control based on SIP (Session Initiation Protocol). The CSCF 410 handles subscriber registration, authentication, billing, triggering and routing by service, inquiry of the location of the called party, compression and release of SIP messages, and can be divided into Proxy_CSCF, Interogating-CSCF and Serving-CSCF depending on its role.

The HLR 420 is a network node including a database including subscriber information for a WCDMA mobile communication network and / or an LTE mobile communication network, and stores subscriber profile information, authentication and location related data.

The MGW 430 is a gateway serving as a gateway between the MGCF 440 and the CGS 260 and converts signaling and media for interworking with an LTE mobile communication network connected to the CSCF 410 and a WCDMA mobile communication network.

The MGCF 440 performs signal conversion for interworking with the PSTN, ISUP (ISDN User Part), and WCDMA used in the SIP and the circuit switched network, and controls the MGW 430. That is, protocol conversion between the legacy network and the IMS call control protocol is performed. For example, the MGCF 440 may convert the signal for the incoming call to the IMS in WCDMA and forward it to the CSCF 410.

The TAS 450 is a server for providing a telephony service and provides additional services such as caller display service, call / incoming call prohibition, call forwarding, and the like. The TAS 450 can be used for group video call service, intelligent network prepaid billing, billing information transmission, voice control at the time of push-to-talk (PTT) function, announcement, ring- And the like.

The MRF 460 acts as a media server that provides media sources on the IMS. The MRF 460 manages the call announcement broadcast (voice / video) provided to the mobile communication terminal device 300 and controls the mixing of streams for multi-party group video calls, conversion between characters and voice / voice recognition, And can operate as a multimedia server for real-time transcoding of data and the like.

The SCC AS 470 provides an SRVCC function that provides continuity with one radio resource so that the mobile communication terminal device 300 does not have to access all of the radio resources provided by the packet network and the circuit network. For example, voice traffic is handed over to the circuit network to provide call continuity when entering the LTE pharmacopoeia during a VoLTE call. When the SCC AS 470 receives a session delivery start message for SRVCC handover of a VoLTE call from the MSC server 280, the SCC AS 470 performs a session delivery procedure according to a session delivery start message, Lt; / RTI >

The HSS 130, the HLR 250 and the HLR 420 shown in FIG. 1 are subscriber data management apparatuses including a database including subscriber information for a WCDMA mobile communication network and an LTE mobile communication network, It can be operated separately or integrated into one node or two nodes. For example, the HLR 250 and the HSS 130 may be integrated into one subscriber data management device, and the HLR 420 may be interworked with the subscriber data management devices separately installed.

2 is a detailed block diagram of a location information updating apparatus 500 according to an embodiment of the present invention. The location information update apparatus 500 may be installed in the MSC server 280 shown in FIG. 1 or interworked with the MSC server 280 in a separately installed state.

As described above, the location information updating apparatus 500 according to the embodiment of the present invention includes a message transmitter 510, a message receiver 520, a message controller 530, and the like.

The message transmission unit 510 transmits a location information update request message for the mobile communication terminal device that has completed the handover from the packet switched domain of the LTE mobile communication system to the circuit switched domain of the WCDMA mobile communication system according to the control of the message control unit 530, To the data management apparatus. In addition, the message transmitter 510 transmits a subscriber data insertion response message including the non-subscriber identification information of the short message service to the subscriber data management device under the control of the message controller 530.

The message receiving unit 520 receives a subscriber data insertion request message including a subscriber profile of the mobile communication terminal apparatus from the subscriber data management apparatus. Also, the message receiving unit 520 receives a location information update response message, which is a response message to the location information update request message transmitted by the message transmitter 510, from the subscriber data management apparatus.

The message control unit 530 controls the message transmission unit 510 to transmit the location information update request message to the subscriber data management device. When the subscriber data insertion request message is received from the subscriber data management apparatus by the message reception unit 520, the message transmission unit 510 is controlled so that the subscriber data insertion response message is transmitted to the subscriber data management apparatus, An information update response message is received.

3 is a flowchart illustrating a method for updating location information according to an embodiment of the present invention.

As shown in the figure, the location information updating method according to the embodiment is a method for updating location information of a mobile communication terminal device that has completed handover from a packet switched domain of a mobile communication network to a circuit switched domain of a mobile communication network by a WCDMA mobile communication system by an LTE mobile communication system And transmitting the location information update request message to the subscriber data management apparatus (S610, S620).

The method further includes receiving (S630) a subscriber data insertion request message including a subscriber profile of the mobile communication terminal apparatus from the subscriber data management apparatus.

The method further includes transmitting, in response to receipt of the subscriber data insertion request message, a subscriber data insertion response message including the subscriber identification information of the short message service for the mobile communication terminal device to the subscriber data management device (S640) .

The method further includes receiving (S650) a location information update response message corresponding to the location information update request message from the subscriber data management device.

4 is a flowchart illustrating an SRVCC handover and a text message service process of a VoLTE call by a mobile communication service system employing a location information updating apparatus according to an embodiment of the present invention.

Hereinafter, the SRVCC handover and the text message service process of the VoLTE call according to the embodiment of the present invention will be described in detail with reference to FIG. 1 to FIG.

First, the mobile communication terminal device 300 located in the service area 111 detects signals of the current wireless network by measuring the received electric field, and transmits the measurement reports to the base station providing the LTE mobile communication service To the eNodeB 110 that performs the < / RTI >

Then, the eNodeB 110 determines (703) an SRVCC handover in which the VoLTE call is handed over from the packet switched domain to the circuit switched domain based on the field measurement report received from the mobile communication terminal device 300. For example, the eNodeB 110 may identify whether the SRVCC procedure should be triggered based on QCI and / or allocation and retention priority values associated with the bearers, and the like.

When the SRVCC handover is determined, the eNodeB 110 generates a handover request message and transmits it to the MME 120 (705). The SRVCC handover parameter in this message indicates that the target domain of the handover is the circuit switched domain.

The MME 120 then performs bearer separation based on the bearer QCI and SRVCC handover parameters to initiate handover from the packet switched domain to the circuit switched domain (707). Then, the MME 120 transmits a handover request message to the MSC server 280 requesting to change from the packet switched domain to the circuit switched domain (709).

Here, when the MSC server 280 and the target MSC to be handed over are different, the MSC server 280 transmits a handover preparation request message to the MSC 240 (711).

The MSC 240 then sends 713 a location reset request message to the RNC 220 requesting allocation of the relocated related resources of the circuit switched domain and the RNC 220 sends a corresponding location reset response message to the MSC 240 (715).

When the MSC server 280 and the target MSC are different, the MSC 240 transmits a handover preparation response message to the MSC server 280 (717).

The MSC server 280 then establishes a circuit connection with the MSC 240 and then triggers a session handover procedure 719 and sends a session delivery initiation message to the SCC AS 470 of the IMS. For example, the session delivery initiation message may use an invite message (721).

Here, the SCC AS 470 returns a session delivery response message to the MSC server 280 when a session delivery start message for handing over a VoLTE call is received from the MSC server 280 (723).

Then, the SCC AS 470 performs a session transfer procedure according to the receipt of the session transfer start message. At this time, the remote end (the party establishing the VoIP session with the originating mobile communication terminal) is updated with the session data protocol (SDP) of the circuit network connection leg during execution of the session delivery procedure. That is, the downlink flow of VoIP packets is switched 725 towards the circuit network connection leg at this point. In addition, the SCC AS 470 releases the IMS connection leg for the packet switched domain (727).

The MSC server 280 then sends 729 a response message to the MME 120 in response to a change request from the packet switched domain to the circuit switched domain and the MME 120 sends a handover command message to the eNodeB 110. [ The eNodeB 110 transmits a handover command message to the mobile communication terminal 300 (731).

Then, the mobile communication terminal 300 performs handover for tuning to a cell in the circuit exchange domain managed by the Node B 210 (733), and handover detection occurs in the RNC 220 . That is, the RNC 220 detects the attachment of the mobile communication terminal device (735).

Thereafter, a location reset complete message indicating that the handover is complete is sent by the RNC 220 to the MSC 240 (737). When the target MSC is not the same as the MSC server 280, the MSC 240 transmits a handover complete message to the MSC server 280 (739).

The MSC server 280 generates a handover completion notification message informing that the handover of the VoLTE call has been completed from the packet switching domain to the circuit switching domain and transmits the handover complete notification message to the MME 120 (741). The MME 120 And transmits a response message to the MSC server 280 (743).

Here, the message controller 530 of the location information updating apparatus 500, which is installed in the MSC server 280 or installed separately from the MSC server 280, interworks with the MSC server 280. After the SRVCC handover from the packet-switched domain to the circuit- The mobile communication terminal 300 is controlled by the message transmission unit 510 to update the location information of the mobile communication terminal 300 according to the control of the message control unit 530 of the message transmission unit 510 Request message to the HLR 250 (745) (S620).

Upon receiving the location information update request message from the MSC server 280, the HLR 250 transmits an Insert Subscriber Data Request message including the subscriber profile of the mobile communication terminal device 300 to the MSC server 280 And the message receiving unit 520 of the location information updating apparatus 500 receives the subscriber data insertion request message from the MSC server 280 in operation S630.

Next, the message control unit 530 of the location information updating apparatus 500 transmits a subscriber data insertion response (" SMS ") message including non-supporting identification information indicating that the SMS message service for the mobile communication terminal apparatus 300, The subscriber data insertion response message generated under the control of the message control unit 530 is transmitted to the HLR 250. The Subscriber Data Insertion Response message is transmitted to the HLR 250 through the Subscriber Data Insertion Response message. For example, the unsupported identification information of the short message service may use a teleservice list parameter (749) (S640).

Then, the HLR 250 receiving the subscriber data insertion response message returns an Update Location Response message corresponding to the received location information update request message in steps 745 and S620, Is received by the message receiving unit 520 of the location information updating apparatus 500 (751) (S650).

Thereafter, the SMSC 290 can perform a location inquiry process with the HLR 250 to provide a short message service to the mobile communication terminal 300. That is, the SMSC 290 transmits the called party location request message to the HLR 250 (753).

Here, since the HLR 250 is informed of the unsupported state of the short message service for the mobile communication terminal 300 in steps 749 and S640, the HLR 250 replies packet exchange information that is not the circuit exchange information of the mobile communication terminal 300 do. That is, the HLR 250 transmits a response message including the packet exchange information to the SMSC 290 (755).

The SMSC 290 then requests 757 the SGSN 230 to send a short message on the basis of the packet switched information provided by the HLR 250. The SGSN 230 then sends an SRVCC And transmits the handover short message (759).

As described above, according to the embodiment of the present invention, when the location information on the handover mobile communication terminal device 300 is updated after performing the SRVCC handover processing of the VoLTE call from the packet switched domain to the circuit switched domain, The home location register 250 can return the packet exchange information other than the circuit exchange information when the called subscriber location information is requested for the short message service because the location register 250 informs the location register 250 of the unsupported state of the short message service. Then, it is possible to continuously provide the short message service through the packet exchange domain based on the packet exchange information to the mobile communication terminal device 300 that has been subjected to the SRVCC handover.

Each block of the block diagrams attached hereto and combinations of steps of the flowchart diagrams may be performed by computer program instructions. These computer program instructions may be loaded into a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus so that the instructions, which may be executed by a processor of a computer or other programmable data processing apparatus, And means for performing the functions described in each step are created. These computer program instructions may also be stored in a computer usable or computer readable memory capable of directing a computer or other programmable data processing apparatus to implement the functionality in a particular manner so that the computer usable or computer readable memory It is also possible for the instructions stored in the block diagram to produce a manufacturing item containing instruction means for performing the functions described in each block or flowchart of the block diagram. Computer program instructions may also be stored on a computer or other programmable data processing equipment so that a series of operating steps may be performed on a computer or other programmable data processing equipment to create a computer- It is also possible that the instructions that perform the processing equipment provide the steps for executing the functions described in each block of the block diagram and at each step of the flowchart.

Also, each block or each step may represent a module, segment, or portion of code that includes one or more executable instructions for executing the specified logical function (s). It should also be noted that in some alternative embodiments, the functions mentioned in the blocks or steps may occur out of order. For example, two blocks or steps shown in succession may in fact be performed substantially concurrently, or the blocks or steps may sometimes be performed in reverse order according to the corresponding function.

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

According to the embodiment of the present invention, after the SRVCC handover process of the VoLTE call from the packet switched domain to the circuit switched domain, when the location information of the handover mobile communication terminal device is updated, When the called subscriber location information is requested for the SMS message service, the subscriber data management device can return the packet switched information because it indicates the unsupported state. Accordingly, it is possible to continuously provide the short message service through the packet exchange domain based on the packet exchange information to the mobile communication terminal device which has been SRVCC handed over.

The present invention can be applied to a heterogeneous mobile communication system in which an LTE mobile communication network operates with various legacy networks.

230: SGSN 250: HLR
280: MSC server 290: SMSC
500: Location information update apparatus 510: Message transmission unit
520: message receiver 530: message controller

Claims (4)

Transmitting a location information update request message to a subscriber data management apparatus for a handover-completed mobile communication terminal apparatus from a packet switched domain of a first mobile communication network to a circuit switched domain of a second mobile communication network;
Receiving a subscriber data insertion request message including a subscriber profile of the mobile communication terminal device from the subscriber data management device;
Transmitting, to the subscriber data management device, a subscriber data insertion response message including the subscriber identification information of the SMS message service for the mobile communication terminal device in response to the reception of the subscriber data insertion request message;
Receiving a location information update response message corresponding to the location information update request message from the subscriber data management device
And updating the location information. The method according to claim 1,
The subscriber data management device receiving the called party location inquiry message for the mobile communication terminal device returns packet exchange information for the short message service
And updating the location information. A location information update request message for a handover-completed mobile communication terminal device from the packet switched domain of the first mobile communication network to the circuit switched domain of the second mobile communication network and a short message service unsupported identification information for the mobile communication terminal device A subscriber data insertion response message,
A message receiver capable of receiving a subscriber data insertion request message including a subscriber profile of the mobile communication terminal device and a location information update response message corresponding to the location information update request message;
Wherein the control unit controls the location information update request message to be transmitted to the subscriber data management apparatus and controls the subscriber data insertion request message to be transmitted to the subscriber data management apparatus when the subscriber data insertion request message is received from the subscriber data management apparatus, A message reception unit for receiving the location information update response message,
And the position information updating device. The method of claim 3,
Wherein the subscriber data management apparatus returns packet exchange information for the short message service when the called subscriber location inquiry message for the mobile communication terminal apparatus is received
A location information update device.

Images