KR102113308B1 - Method and apparatus for updating information of location - Google Patents

Abstract

The present invention relates to a method and apparatus for updating location information. The disclosed method of updating location information includes transmitting a location information update request message for a mobile communication terminal device for which handover is completed from a packet switching domain of a first mobile communication network to a circuit switching domain of a second mobile communication network to a subscriber data management device. , Receiving a subscriber data insertion request message including a subscriber profile of a mobile communication terminal device from a subscriber data management device, and in response to receiving a subscriber data insertion request message, unsupported identification of a short message service for the mobile communication terminal device And transmitting a subscriber data insertion response message including information to the subscriber data management apparatus, and receiving a location information update response message corresponding to the location information update request message from the subscriber data management apparatus. Accordingly, when the destination subscriber location information is requested for the short message service, the subscriber data management device may return the packet exchange information, and the short circuit through the packet exchange domain based on the packet exchange information to the SRVCC handover mobile communication terminal device. It has the advantage of continuously providing a message service.

Description

Method and device for updating location information {METHOD AND APPARATUS FOR UPDATING INFORMATION OF LOCATION}

The present invention relates to a method and apparatus for updating location information, and a Voice over Long Term Evolution (Volte) from a packet switched domain to a circuit switched domain for Single Radio Voice Call Continuity (SRVCC) function It relates to a method and apparatus for updating location information to provide a short message service to a mobile communication terminal device handed over to a circuit switching domain after handing over a call.

As is well known, 3GPP Release 8 describes an Evolved Packet Core (EPC), which is a network architecture, as one of the mobile communication systems. EPC is a set of network nodes for 3GPP Long Term Evolution (LTE) system. EPC has evolved 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 also increases the efficiency of the packet network. In order to simplify the network node, it has an efficient network structure. A wireless communication system including EPC and E-UTRAN may be referred to as an Evolved Packet System (EPS), and LTE mobile communication systems currently being serviced in Korea correspond to this.

On the other hand, in the early stage of building an LTE mobile communication system, a mixed communication environment with a legacy network such as a WCDMA mobile communication system appears. A dual mode mobile communication terminal device capable of accessing the same legacy network may be operated. In addition, at the beginning of the LTE mobile communication service, a WCDMA mobile communication system was used to provide a voice call service to a dual mode mobile communication terminal device, and an LTE mobile communication system was used to provide a data communication service.

Unlike this, the VoLTE service uses an LTE mobile communication system, not only for data communication but also for voice calls. This VoLTE service is also referred to as a high definition (HD) voice service. According to the VoLTE service, it is possible to provide a clearer HD-class voice call service during a voice call, and users can share content such as maps, music, news, photos, etc. while showing a screen like a counterpart in real time during a call. .

However, since the service area of the LTE network is limited at present, there is a problem in that the continuity of a voice call is not guaranteed in an area where the radio wave environment is poor, such as outside the limited area or a service cell border area. In order to solve this problem, there is a trend to provide voice call continuity in conjunction with a circuit switched network. At this time, a single radio voice call continuity (SRVCC) function is provided to provide continuity with one radio resource so that the mobile communication terminal device 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 handovers voice traffic to a circuit network to provide call continuity when entering the LTE weak field during VoLTE calls.

However, the mobile communication terminal device handed over from the packet switching domain to the circuit switching domain by the SRVCC function can be guaranteed call continuity even with one radio resource, while the handover provides a short message service. Cannot be provided.

As a method to solve this, a short message transmission function to a circuit switching node such as a Mobile Switching Center Server (MSC server) (or enhanced MSC) that provides a session data protocol for voice and video for SRVCC function If additional is given, short message service can be continuously provided even after SRVCC handover.

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

Republic of Korea Patent Publication No. 10-2013-0064709, date of publication June 18, 2013.

According to an embodiment of the present invention, after the SRVCC handover processing of the VoLTE call from the packet switching domain to the circuit switching domain, when updating the location information for the handed mobile communication terminal device, the short message service is provided to the subscriber data management device. Provided is a method and apparatus for updating location information by providing an unsupported status and providing a short message service through a packet switching domain.

The problem to be solved of the present invention is not limited to those mentioned above, and another problem to be solved that is not mentioned will be clearly understood by those having ordinary knowledge to which the present invention belongs from the following description.

The method for updating location information according to an aspect of the present invention manages subscriber data for a location information update request message for a mobile communication terminal device in which handover is completed from a packet switching domain of a first mobile communication network to a circuit switching domain of a second mobile communication network. Transmitting to a device, receiving a subscriber data insertion request message including a subscriber profile of the mobile communication terminal device from the subscriber data management device, and in response to receiving the subscriber data insertion request message, the mobile communication Transmitting a subscriber data insertion response message including unsupported identification information of a short message service to a terminal device to the subscriber data management device, and a location information update response corresponding to the location information update request message from the subscriber data management device Receiving a message May include a step.

The apparatus for updating location information according to another aspect of the present invention includes a location information update request message and mobile communication for a mobile communication terminal device in which handover is completed from a packet switching domain of a first mobile communication network to a circuit switching domain of a second mobile communication network. A message transmitting unit for transmitting a subscriber data insertion response message including unsupported identification information of a short message service for a terminal device, a subscriber data insertion request message including a subscriber profile of the mobile communication terminal device, and the location information update request message A message receiving unit for receiving a corresponding location information update response message, and controls to transmit the location information update request message to a subscriber data management device, and inserts the subscriber data when the subscriber data insertion request message is received from the subscriber data management device. Response message may be a message, the receiver is controlled to be transmitted to the subscriber data management unit includes a message control unit for replying to receive the location information update response message.

According to an embodiment of the present invention, after the SRVCC handover processing of the VoLTE call from the packet switching domain to the circuit switching domain, when updating the location information for the handed mobile communication terminal device, the short message service is provided to the subscriber data management device. Since the unsupported status is notified, the subscriber data management apparatus may return packet exchange information when the destination subscriber location information is requested for the short message service.

Then, the short message service can be continuously provided to the SRVCC handover mobile communication terminal device through the packet switching domain based on the packet switching information.

Therefore, in order to support the short message transmission function, since the hardware and software such as the MSC server are not significantly upgraded and only the service unsupported identification information is added, 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 device according to an embodiment of the present invention.
2 is a detailed configuration diagram of an apparatus for updating location information 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 for explaining SRVCC handover and text message service process of a VoLTE call by a mobile communication service system employing a location information updating device according to an embodiment of the present invention.

Advantages and features of the present invention, and methods for achieving them will be clarified with reference to embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only the embodiments allow the disclosure of the present invention to be complete, and common knowledge in the technical field to which the present invention pertains. It is provided to completely inform the person having the scope of the invention, and the present invention is only defined by the scope of the claims.

In describing embodiments of the present invention, when it is determined that a detailed description of known functions or configurations may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. In addition, terms to be described later are terms defined in consideration of functions in an embodiment of the present invention, which may vary according to a user's or operator's intention or practice. Therefore, the definition should be made 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 device according to an embodiment of the present invention. 1 illustrates a case where the WCDMA mobile communication network is operated as a legacy network, but the legacy network is not limited thereto. For example, other asynchronous mobile communication networks such as GSM (Global System for Mobile) or other synchronous mobile communication networks such as CDMA2000 may be used together with the LTE mobile communication network.

As shown in this, the mobile communication terminal device (Mobile Equipment) 300 may be operated in a mixed environment of legacy networks such as an LTE mobile communication network providing packet-based voice services and a WCDMA mobile communication network providing circuit-based voice services. The mobile communication terminal device 300 is a service of the NodeB 210 in which the service area 111 of the eNodeB 110 serving as a base station constituting the LTE mobile communication network serves as a base station constituting a WCDMA mobile communication network. It may be operated in a service overlapping region included in the region 211. The mobile communication terminal device 300 is located in any one of a plurality of cells existing in the service area 111 of the eNodeB 110 to receive a mobile communication service, and receives the electric field measurement report from the eNodeB 110. To give. For example, the mobile communication terminal device 300 may be implemented in various forms such as a smart phone, a notepad, and a tablet computer.

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

The eNodeB 110 communicates with the mobile communication terminal device 300 and serves as a base station to ensure mobility. The eNodeB 110 includes radio bearer control, radio admission control, connection mobility control, dynamic resource allocation to the mobile communication terminal device 300, and the like. It 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, Measurement and measurement reporting settings for mobility and scheduling are performed.

In addition, the eNodeB 110 is handed over so that the mobile communication terminal device 300 can establish a call by accessing a wireless access network that provides a relatively superior voice call quality among the eNodeB 110 and the NodeB 210. Can decide. In particular, it is possible to determine the handover of the VoLTE call from the packet switching domain to the circuit switching domain based on the electric field measurement report provided from the mobile communication terminal device 300.

The MME 120 is responsible for signal control between the eNodeB 110 and the SGW 140, and determines routing for transmission data of the mobile communication terminal device 300. The MME 120 performs paging message distribution to the eNodeB 110, NAS (Non Access Spectrum) signaling, intra-network handover control, and tracking area list management. Further, 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 is a mobile communication terminal device 300 or another network node, such as processing a control signal when there is a request for a combination or a radio bearer setup request from the PGW 150 or the SGW 140, etc. It is responsible for various functions of the control plane, and receives subscriber profile information, authentication, and location-related data from the HSS 130 to establish and move the EPS packet bearer (Evolved Packet System bearer) or IP tunnel (IP tunnel). It performs functions such as mobility management.

The HSS 130 is a network node including a database 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 to process payload traffic according to the established session. Interworking with the eNodeB 110 and the S1-U interface, it supports handoff in the 3GPP, sets the PGW 150 and the EPS bearer, and transmits a PDU (Packet Data Unit) using tunneling. The SGW 140 selects the PGW 150 based on the subscriber profile, and in the case of an inbound roaming call, generates charging data for mutual settlement with the PGW of the home network.

The PGW 150 is a user plane node that allocates an IP of the mobile communication terminal device 300 and performs session control interworking with an external Internet network and a non-3GPP network. For packet service, it maintains routing information with the SGW 140 and external networks, and performs tunneling and IP routing functions. In addition, PDUs are delivered to the SGW 140 and the external network. The PGW 150 performs charging processing in the case of a local call.

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

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

The NodeB 210 secures the 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 NodeB 210, and is responsible for functions such as handover. 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 various RNCs 220 and is in charge of mobility and packet session management of the mobile communication terminal device 300, can perform IP routing, and registers the location of the mobile communication terminal device 300 and You can do the same interaction.

In particular, the SGSN 230 is the mobile communication terminal device 300 after the SRVCC handover from the packet switching domain to the circuit switching domain, the packet exchange path RNC 220 and NodeB 210 at the request of the SMSC 290 Send a short message to the mobile communication terminal device 300 through.

The MSC 240 stores visitor location information, and receives subscriber profile information, authentication, and location-related data from the HLR 250 to perform switching control for voice communication. When the preparation for SRVCC handover of the VoLTE call is requested from the MSC server 280, the MSC 240 requests the RNC 220 of the radio access network area to reset the location for the SRVCC handover, and from the RNC 220 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 database that contains subscriber information for a WCDMA mobile communication network, and stores subscriber profile information, authentication, and location related data.

In particular, the HLR 250 is the MSC server 280 targeting the mobile communication terminal device 300 in the process of updating location information for the mobile communication terminal device 300 SRVCC handover from the packet switching domain to the circuit switching domain. When the unsupported status of the short message service is notified, packet exchange information of the mobile communication terminal device 300 is provided to the SMSC 290 in the process of inquiring the location of the called subscriber.

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

GGSN 270 acts as a gateway that connects directly to the IP network and connects the PS domain of the IP network and WCDMA network, maintains routing information between the SGSN 230 and the external network, and tunnels and IP routing. Perform a function.

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

In particular, the MSC server 280 may be equipped with a location information updating device (reference numeral 500 in FIG. 2) according to an embodiment of the present invention, or may be interlocked with a separately installed location information updating apparatus (reference numeral 500 in FIG. 2). . When the MSC server 280 performs SRVCC handover processing of the VoLTE call from the packet switching domain to the circuit switching domain, and then updates the location information for the handed mobile communication terminal device 300, the home location register 250 It informs the unsupported status of the short message service to provide a short message service targeting the mobile communication terminal device 300 through the packet exchange domain. The detailed 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 a short message service to the mobile communication terminal device 300. The SMSC 290 provides a short message service through a circuit switched domain according to a general service flow. However, if the HLR 250 provides packet switching information in the process of inquiring the location of the called subscriber for the SRVCC handover from the packet switching domain to the circuit switching domain, the mobile communication terminal through the packet switching domain is exceptional. A short message service is provided to the device 300.

Call Session Control Function (CSCF) 410, HLR 420, Media Gateway (MGW) 430, Media Gateway Control Function (MGCF) 440, Telephony Application Server (TAS) 450, Multimedia Resource Function (460), SCC AS (Service Centralization and Continuity Application Server) (470), etc. 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 one server, and may be referred to as an application server (AS). One AS may provide all application service functions, and multiple AS may provide application service functions according to each function.

CSCF 410 is an infrastructure system that performs call processing and performs basic functions for multimedia session control based on Session Initiation Protocol (SIP). The CSCF 410 processes subscriber registration, authentication, charging, triggering and routing for each service, caller location inquiry, and compression and decompression of SIP messages, and can be divided into Proxy_CSCF, Interogating-CSCF, and Serving-CSCF according to the role.

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

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

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

The TAS 450 is a server that provides a telephony service, and provides additional services such as caller ID service, call / prohibition, and call forwarding. These, TAS (450) is a group video call service, intelligent network prepaid billing processing, billing information transmission, PTT (Push-To-Talk) control function, announcement, ringback tone (Ring-back-tone) function It is a device for providing various application services.

The MRF 460 acts as a media server that provides media sources on the IMS. In addition, the MRF 460 manages call guidance broadcasting (voice / video) provided to the mobile communication terminal device 300, mixes streams for multi-party group video calls, converts text to voice / voice recognition, and multimedia It can operate as a multimedia server for real-time transcoding of data.

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 need to access all of the radio resources provided by the packet network and the circuit network. For example, when entering the LTE weak field during a VoLTE call, voice traffic is handed over to the circuit network to provide call continuity. When the session forwarding message for SRVCC handover of the VoLTE call is received from the MSC server 280, the SCC AS 470 performs a session forwarding procedure according to the session forwarding start message, and the IMS access leg for the packet switched domain Release it.

The HSS 130, HLR 250, and HLR 420 shown in FIG. 1 are subscriber data management devices including a database including subscriber information for a WCDMA mobile communication network and an LTE mobile communication network, as illustrated They may be operated separately, or may be integrated into one node or two nodes. For example, the HLR 250 and the HSS 130 are integrated into a single subscriber data management device, and the HLR 420 may be interlocked while being installed separately from them.

2 is a detailed configuration diagram of an apparatus 500 for updating location information according to an embodiment of the present invention. The location information updating apparatus 500 may be mounted on the MSC server 280 illustrated in FIG. 1 or may be interlocked with the MSC server 280 in a separately installed state.

As shown in this, the apparatus 500 for updating location information according to an embodiment of the present invention includes a message transmitter 510, a message receiver 520, and a message controller 530.

The message transmitting unit 510 registers a location information update request message for the mobile communication terminal device in which handover is completed from the packet switching domain of the LTE mobile communication system to the circuit switching domain of the WCDMA mobile communication system under the control of the message control unit 530 Send to the data management device. In addition, the message transmitting unit 510 transmits a subscriber data insertion response message including unsupported identification information of the short message service to the mobile communication terminal device to the subscriber data management device under the control of the message control unit 530.

The message receiving unit 520 receives a subscriber data insertion request message including a subscriber profile of the mobile communication terminal device from the subscriber data management device. In addition, 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 transmission unit 510 from the subscriber data management device.

The message controller 530 controls the location information update request message to be transmitted to the subscriber data management apparatus by the message transmitter 510. In addition, when the subscriber data insertion request message is received from the subscriber data management device by the message receiving unit 520, the message receiving unit 520 is located by controlling the message transmitting unit 510 so that the subscriber data insertion response message is transmitted to the subscriber data management device. Be sure to receive an information update response message.

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

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

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

In addition, in response to receiving the subscriber data insertion request message, further comprising the step of transmitting a subscriber data insertion response message including unsupported identification information of the short message service to the mobile communication terminal device (S640). .

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

4 is a flow chart for explaining the SRVCC handover and text message service process of a VoLTE call by a mobile communication service system employing a location information update device according to an embodiment of the present invention.

Hereinafter, a process of SRVCC handover and text message service of a VoLTE call according to an embodiment of the present invention will be described in more detail with reference to FIGS. 1 to 4.

First, the mobile communication terminal device 300 located in the service area 111 measures the received electric field to detect signals of the current wireless network, and serves as a base station that provides LTE mobile communication services with measurement reports. It transmits to the eNodeB (110) performing (701).

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

Then, when the SRVCC handover is determined, the eNodeB 110 generates a handover required 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 a circuit switched domain.

Then, the MME 120 initiates handover from the packet switched domain to the circuit switched domain by performing bearer separation based on the QCI and SRVCC handover parameters of the bearer (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 target MSC that needs to perform the handover processing differs from the MSC server 280, the MSC server 280 transmits a handover preparation request message to the MSC 240 (711).

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

Then, 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).

Then, the MSC server 280 establishes a circuit connection with the MSC 240, triggers a session handover procedure (719), and sends a session forwarding start message to the SCC AS 470 of the IMS. For example, an in-byte message may be used as the session forwarding start message (721).

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

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

Next, the MSC server 280 sends a response message to the MME 120 in response to a change request from the packet switching domain to the circuit switching domain (729), and the MME 120 sends a handover command message to the eNodeB 110 ENodeB 110 sends a handover command message to the mobile communication terminal device 300 (S731).

Then, the mobile communication terminal device 300 performs a handover to tune the cell of the circuit switched domain managed by the NodeB 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 completion message indicating that handover is completed is transmitted to the MSC 240 by the RNC 220 (737). Then, when the target MSC is not the same as the MSC server 280, the MSC 240 transmits a handover completion message to the MSC server 280 (739).

Then, the MSC server 280 generates a handover completion notification message informing that the handover of the VoLTE call is completed from the packet switching domain to the circuit switching domain, and transmits it to the MME 120 (741), and the MME 120 A response message is transmitted to the MSC server 280 (743).

Here, the message control unit 530 of the location information updating apparatus 500 that is mounted on the MSC server 280 or installed in a separate installation and interworking with the MSC server 280 is completed after SRVCC handover from the packet switching domain to the circuit switching domain is completed. (S610), to control the message transmission unit 510 to update the location information for the mobile communication terminal device 300, and the location information update request under the control of the message control unit 530 of the message transmission unit (510) (Update Location Request) message is transmitted to the HLR 250 (745) (S620).

Then, the HLR 250 receiving the location information update request message from the MSC server 280 sends an MSC server 280 an Insert Subscriber Data Request message containing the subscriber profile of the mobile communication terminal device 300. ), And the message receiving unit 520 of the location information updating apparatus 500 receives a subscriber data insertion request message from the MSC server 280 (747) (S630).

Next, the message controller 530 of the location information updating device 500 responds to inserting subscriber data including unsupported identification information indicating that the short message service for the SRVCC handover mobile communication terminal device 300 is not supported ( Insert Subscriber Data Response) controls the message transmitter 510 to generate a message, and the message transmitter 510 transmits the subscriber data insertion response message generated under the control of the message controller 530 to the HLR 250. 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 location information update request message received in steps 745 and S620, and this location information update response message Is received by the message receiving unit 520 of the location information updating device 500 (751) (S650).

Thereafter, the SMSC 290 may perform a process of inquiring the location of the called subscriber with the HLR 250 in order to provide a short message service to the mobile communication terminal device 300. That is, the SMSC 290 transmits an incoming subscriber location request message to the HLR 250 (753).

Here, since the HLR 250 is notified of the unsupported status of the short message service for the mobile communication terminal device 300 in steps 749 and S640, the packet exchange information is returned instead of the circuit exchange information of the mobile communication terminal device 300. do. That is, the HLR 250 transmits a response message including packet exchange information to the SMSC 290 (755).

Then, the SMSC 290 requests the SGSN 230 to transmit a short message based on the packet exchange information provided by the HLR 250 (757), and the SGSN 230 requests the SRVCC according to the SMSC 290 request. A handover short message is transmitted (759).

As described so far, according to an embodiment of the present invention, when a VoLTE call is processed from the packet switched domain to the circuit switched domain by SRVCC handover processing, the home information is updated when the location information for the handed mobile communication terminal device 300 is updated. Since the location register 250 informs the unsupported status of the short message service, the home location register 250 may return packet exchange information, not circuit exchange information, when the destination subscriber location information is requested for the short message service. Then, the short message service can be continuously provided to the SRVCC handover mobile communication terminal device 300 through the packet switching domain based on the packet switching information.

The combinations of each block in the block diagrams and each step in the flowcharts attached to this specification may be performed by computer program instructions. These computer program instructions may be mounted on a processor of a general purpose computer, special purpose computer, or other programmable data processing equipment, so that instructions performed through a computer or other programmable data processing equipment processor may be used in each block or flowchart of the block diagram. In each step, means are created to perform the functions described. These computer program instructions can also be stored in computer readable or computer readable memory that can be oriented to a computer or other programmable data processing equipment to implement a function in a particular way, so that computer readable or computer readable memory The instructions stored in it are also possible to produce an article of manufacture containing instructions means for performing the functions described in each step of each block or flowchart of the block diagram. Computer program instructions can also be mounted on a computer or other programmable data processing equipment, so a series of operational steps are performed on a computer or other programmable data processing equipment to create a process that is executed by the computer to generate a computer or other programmable data. It is also possible for instructions to perform processing equipment to provide steps for performing the functions described in each block of the block diagram and in each step of the flowchart.

Further, each block or each step can 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 it is possible that the functions mentioned in blocks or steps occur out of order. For example, two blocks or steps shown in succession may in fact be executed substantially simultaneously, or it is also possible that the blocks or steps are sometimes performed in reverse order depending on the corresponding function.

The above description is merely illustrative of the technical idea of the present invention, and those of ordinary skill in the art to which the present invention pertains may make various modifications and variations without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the claims below, and all technical thoughts within the equivalent range should be interpreted as being included in the scope of the present invention.

According to an embodiment of the present invention, after the SRVCC handover processing of a VoLTE call from the packet switching domain to the circuit switching domain, when updating location information for the handed mobile communication terminal device, the short message service to the subscriber data management device is provided. Since the unsupported status is notified, the subscriber data management apparatus may return packet exchange information when the destination subscriber location information is requested for the short message service. Accordingly, the short message service can be continuously provided to the SRVCC handover mobile communication terminal device through the packet switching domain based on the packet switching information.

The present invention can be used in a heterogeneous mobile communication system in which the LTE mobile communication network is operated with various legacy networks.

230: SGSN 250: HLR
280: MSC server 290: SMSC
500: location information update device 510: message transmitter
520: message receiving unit 530: message control unit

Claims (4)

Transmitting a location information update request message to a subscriber data management device for a mobile communication terminal device in which handover is completed from a packet switching domain of the first mobile communication network to a circuit switching domain of the 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;
In response to receiving the subscriber data insertion request message, transmitting a subscriber data insertion response message including unsupported identification information of the short message service to the mobile communication terminal device to the subscriber data management device;
Receiving a location information update response message corresponding to the location information update request message from the subscriber data management device
Location information update method comprising a. ◈ Claim 2 was abandoned when payment of the registration fee was set.◈ According to claim 1,
Returning packet exchange information for the short message service by the subscriber data management device that has received the incoming subscriber location inquiry message for the mobile communication terminal device;
Location information update method further comprising a. Includes a location information update request message for a mobile communication terminal device for which handover is completed from a packet switching domain of a first mobile communication network to a circuit switching domain of a second mobile communication network and unsupported identification information of a short message service for the mobile communication terminal device. A message transmission unit that transmits a subscriber data insertion response message;
A message receiving unit for 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;
The location information update request message is controlled to be transmitted to the subscriber data management apparatus, and when the subscriber data insertion request message is received from the subscriber data management apparatus, the subscriber data insertion response message is controlled to be transmitted to the subscriber data management apparatus to control the A message control unit that causes the message receiving unit to receive a reply to the location information update response message
Location information update device comprising a. ◈ Claim 4 was abandoned when payment of the set registration fee was made.◈ The method of claim 3,
The subscriber data management apparatus returns packet exchange information for the short message service when an incoming subscriber location inquiry message for the mobile communication terminal device is received.
Location information update device.

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