KR102006150B1 - Method and Apparatus for Providing Services in Heterogeneous Network System - Google Patents

Abstract

A method for providing a service in a heterogeneous network system and an apparatus therefor are disclosed.
There is provided a method and apparatus for providing a service in a heterogeneous network system that temporarily provides a specific service by utilizing resources or functions of another network system when it is difficult or impossible to directly provide a specific service in a network system to which the user terminal is connected .

Description

Technical Field [0001] The present invention relates to a method for providing a service in a heterogeneous network system,

An embodiment of the present invention relates to a method and apparatus for providing services in a heterogeneous network system.

The contents described in this section merely provide background information on the embodiment of the present invention and do not constitute the prior art.

The number of users of the mobile communication system has increased sharply, and not only the total data usage has greatly increased, but also the data usage and the number of users in each individual coverage are increasing.

Recently, efforts have been made to develop a next-generation network such as a 5G (5th-Generation) communication system or a pre-5G communication system to meet the demand of wireless data traffic, which has been increasing since the commercialization of 4G (4th- ought.

The mobile communication system uses wireless transmission, and the wireless transmission quality is time-varying according to the wireless state between the terminal and the base station. If the wireless transmission quality is below a certain level, the service itself may become impossible. For example, although it is necessary to provide a specific service, it may be difficult or impossible to provide the service to the terminal because the network state of the mobile communication system to which the terminal is currently connected is changed to a certain level or less.

In order to prevent the above-described situation, the mobile communication system should support an appropriate level of service quality and mobility considering the characteristic of the user's service. Especially, a service having a high level of importance such as an emergency call or a disaster letter should be provided regardless of the status of the user terminal, the network status, and the like.

The embodiment of the present invention provides a service in a heterogeneous network system that temporarily provides a specific service by utilizing resources or functions of another network system when it is difficult or impossible to directly provide a specific service in a network system to which the user terminal is connected Method and apparatus for the same.

According to an aspect of an embodiment of the present invention, there is provided a method of providing a service in a heterogeneous network system, the method comprising: a registration process in which a user terminal performs registration in a first network system; A network determining step of determining a network for providing a specific one of the first network system and the second network system based on the service request signal received from the service node; A system switching step of, when the specific service is provided through the second network system, the first network system transmitting a system switching command to the user terminal; And a service receiving step of performing a connection with the second network system based on the system switching command at the user terminal and receiving the specific service from the second network system. ≪ / RTI >

According to another aspect of the present invention, there is provided a terminal apparatus for receiving a specific service in a heterogeneous network system, the terminal apparatus comprising: a transceiver for transmitting and receiving signals; And when a system switching command for a second network system capable of providing a specific service is received, switching the system by performing connection with the second network system, And a control unit for receiving the specific service from the second network system.

As described above, according to the embodiment of the present invention, when a service is temporarily or permanently disabled for a specific service in a predetermined network system, the service can be provided by utilizing resources of another network system.

Further, according to the embodiment of the present invention, there is an effect that it can be provided without omission of services such as emergency calls, disaster letters, and voice services with high importance.

In addition, according to an embodiment of the present invention, when a terminal can simultaneously register in two network systems, the infrastructure for a specific service can be linked to only one system without interworking with the two systems, Can be increased.

In addition, according to the embodiment of the present invention, power consumption of the terminal and wait time for a specific service can be reduced.

1 is a conceptual diagram illustrating a heterogeneous network system according to an embodiment of the present invention.
2 is a flowchart illustrating a method of providing a service in a heterogeneous network system according to a first embodiment of the present invention.
3 is a flowchart illustrating a method of providing a service in a heterogeneous network system according to a second embodiment of the present invention.
4 is a flowchart illustrating a method of providing a service in a heterogeneous network system according to a third embodiment of the present invention.
5 is a flowchart illustrating a method of providing a service in a heterogeneous network system according to a fourth embodiment of the present invention.
6 is a block diagram schematically illustrating a structure of a user terminal according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

It should be noted that, in adding the identification codes to the constituent elements of the respective drawings, the same constituent elements are denoted by the same reference symbols as possible even if they are displayed on different drawings. 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. Also, '… Quot ;, " module ", and " module " refer to a unit that processes at least one function or operation, and may be implemented by hardware or software or a combination of hardware and software. In addition, some of the steps constituting the embodiments of the present invention may be omitted or the order may be changed.

The present invention relates to a method of temporarily providing a corresponding service using another mobile communication system when it is difficult to provide a specific service in the mobile communication system, and can be applied to industry and technology fields using a mobile communication system. More specifically, the present invention is directed to a mobile communication system (Evolved Packet System or Long Term Evolution system, Next Generation Next Generation system) operating based on the 3GPP standard.

In this specification, a wireless communication system capable of providing a multiple connectivity service to a terminal by interworking a plurality of different wireless access technologies coexisting with an existing wireless communication system and a next generation wireless communication system will be described. An embodiment of the present invention will be described taking an LTE (Long Term Evolution) or 4G system as an example of a conventional wireless communication system and a 5G system or a NR (New Radio) system as a next generation wireless communication system. However, this is only an example, and at least partly another wireless communication system may be included.

1 is a conceptual diagram illustrating a heterogeneous network system according to an embodiment of the present invention.

As shown in FIG. 1, one network system may co-exist with another heterogeneous network system. For example, the heterogeneous network system may be constructed such that the first network system 110 and the second network system 120 coexist.

The heterogeneous network system according to the present embodiment may include a user terminal 100, a first network system 110, and a second network system 120. [ The first network system 110 may be a next generation network system, for example, a 5G mobile communication system, and the second network system 120 may be a conventional network system such as a 4G mobile communication system.

A user equipment (UE) 100 is a base for communicating with a base station, and may be fixed or mobile. The user terminal 100 may be referred to not only as a UE but also as a mobile station (MS), a mobile equipment (ME), a terminal, and the like.

The first network system 110 includes components such as a first base station device 112 and a first core network device 114 and the second network system 120 includes components such as a second base station device 122, A core network device 124, and the like.

The first base station device 112 and the second base station device 122 may be base stations. Here, a base station is a main body that communicates with a terminal, and provides a connection to a core network. The base station may be referred to as a BS, a Node B (NB), an eNodeB (eNB), a gNodeB (gNB)

The first core network device 114 and the second core network device 124 may be devices constituting a core network of each of the first network and the second network.

For example, the first core network device 114 may be an Access and Mobility Management Function (AMF) of a 5G network. Here, the AMF is a termination of a RAN (Radio Access Network) CP (Control Plane) interface (e.g., N2) and an end of a NAS (Non-Access Stratum). AMF supports functions such as Registration Management, Connection Management, Reachability Management, Mobility Management, Access Authentication, and Access Authorization. . The AMF can be implemented in a form that software is loaded on the above functions in one virtualized network device. In other words, it can be implemented as a virtualized node rather than a physical node.

Also, the second core network device 124 may be an MME (Mobility Management Entity) of the LTE network. The MME (Mobility Management Entity) performs an operation of allocating an S-GW (Serving Gateway) and a PGW (PDN Gateway) in the LTE network according to the type of mobile communication service for E2E (End to End) connection between the UE and the PDN .

In the embodiment of the present invention, when a network system to which a user terminal is connected in a heterogeneous network environment is difficult or impossible to directly provide a specific service, provision of a specific service by temporarily utilizing resources or functions of another network system, Emergency call, disaster letter, voice service, and the like, and can improve service quality, mobility, service availability, and the like. Hereinafter, a method of providing a service in a heterogeneous network system through the first to fourth embodiments will be described.

2 is a flowchart illustrating a method of providing a service in a heterogeneous network system according to a first embodiment of the present invention.

The operation of the user terminal 100, the heterogeneous network systems 110 and 120, and the service node 130 for providing services in the heterogeneous network system according to the first embodiment of the present invention. Here, the heterogeneous network systems 110 and 120 may include a first network system 110 and a second network system 120, and may include a subscriber information DB (not shown) for managing subscriber information of the first network and the second network Hour), and the like.

The first network system 110 includes components such as a first base station device 112 and a first core network device 114 and the second network system 120 includes components such as a second base station device 122, A core network device 124, and the like.

In the first embodiment of the present invention, when the user terminal 100 accesses the first network system 110 in order to receive a service, it exchanges service related information that can be provided in the second network system 120, When it is difficult to provide a service to the user terminal 100 from the first network system 110, a method of providing a service by switching the connection of the user terminal 100 to the second network system 120 is proposed. Hereinafter, with reference to FIG. 2, a method for providing a service in a heterogeneous network system according to the first embodiment will be described in detail.

The user terminal 100 negotiates capability of the terminal and the network with the first network system 110 in step S210 and performs registration or attachment on the first network system 110 S212).

Specifically, the user terminal 100 transmits a registration request for connection with the first network system 110, and the first network system 110 transmits a registration response message (Attach or Registration Accept) message to the first network system 110 To the user terminal 100 and performs registration. Here, the registration between the user terminal 100 and the first network system 110 is performed by exchanging a non-access stratum (NAS) signaling message with the corresponding connection after the RRC connection is processed. The user terminal 100 must be registered prior to receiving a communication service from the network system.

While performing registration between the user terminal 100 and the first network system 110, the first core network device 114 of the first network system 110 may exchange information with the second network system 120 The first core network device 114 may connect to the second network system 120 and may transmit information on the capability of the user terminal 100.

In addition, the first network system 110 exchanges types of services to be received by the user terminal 100 through the second network system 120, service-related detailed information, and the like. Here, the first network system 110 may determine whether to provide a service to the user terminal 100 through the second network system 120. [

The first core network device 114 is connected to the user terminal 100 by the second core network device 124 when the operation for providing the service by the user terminal 100 through the second network system 120 is allowed, And information about the service to be provided through the second network system 120. [ Here, the first core network device 114 may obtain a response signal indicating whether the service can be provided from the second core network device 124.

The second core network device 124 transmits the system switching related information for shortening the time for switching from the first network system 110 to the second network system 120 to provide a specific service to the first core network device 114 ). In this case, the system switching related information may be transmitted in a form included in a response signal indicating whether or not the service can be provided, and may include a temporary identifier of the user terminal, security related information, QoS related information, Information related to the wireless base station of the system, and the like.

The first core network device 114 transfers the system switching related information received from the second core network device 124 to the user terminal 100. Here, the system switching related information may be included in the registration response permission message or may be transmitted simultaneously with the registration response permission message.

In step S210 and step S212, the second network system 120 transmits information on the second core network device 124 to the subscriber information DB (not shown) to receive a service request signal such as a service occurrence / arrival alarm Registration process can be performed. Herein, the operation of registering the information on the second core network device 124 in the subscriber information DB (not shown) may be performed directly in the second network system 120, but the present invention is not limited thereto, The address of the second core network device 124 may be transferred to the subscriber information DB (not shown) and processed.

The first network system 110 receives the service request signal from the service node 130 in steps S220 and S230 and transmits the service request signal to the first network system 110 and the second network system 110 in consideration of the capability of the terminal and the network 120 in step S240.

Specifically, when a service request signal according to service occurrence is received, the service node 130 determines which network system the received service request signal is to be transmitted to, based on the subscriber information DB (not shown) using the service type, the identifier of the subscriber, And receives the address of the second core network device 124 registered in step S210 and step S212 from the subscriber information DB (not shown). Here, the identifier of the subscriber means a concept including the identifier of the terminal, and may be used as an identifier of the terminal when the terminal specified for the service exists.

The service node 130 delivers a service request message including the type of service and the identifier of the subscriber to the second core network device 124. The second core network device 124 transmits a service request message to the first core network 124. [ To the device 114.

The first core network device 114 determines whether to provide the service corresponding to the service request message through the second network system 120 in consideration of the capabilities of the terminal and the network.

Paging between the user terminal 100 and the first network system 110 to resume communication (S250).

Specifically, when the user terminal 100 is in an idle state, the first core network device 114 performs paging to resume communication of the user terminal 100. That is, the first core network device 114 may transmit a network-initiated service request (NW-initiated service request) to the user terminal 100 to change the RRC-IDLE state of the user terminal 100 to the RRC-CONNECTED state have.

The first network system 110 transmits a system switching command to the user terminal 100 (S260, S270).

Specifically, the first core network device 114 transmits a system switch command to the first base station device 112 to provide a specific service, and the first base station device 112 transmits the received system switch command to the user terminal 100). That is, the first core network device 114 transmits a system switchover command to switch from the first network system 110 to the second network system 120 for reception of a specific service via the first base station device 112, To the terminal (100). Here, the system switching command may include an identifier of a subscriber, a service type, and the like.

The first network system 110 transmits a system switching command to the user terminal 100 so that the RNC connection release between the first base station apparatus 112 and the user terminal 100 is performed together.

The first network system 110 performs a process of exchanging information with the second network system 120 in order to shorten the time required to switch the system from the first network system 110 to the second network system 120 can do. That is, when the first base station device 112 can collect information about the second base station device 122 adjacent to the first base station device 112, the time when the user terminal 100 accesses the second base station device 122 for system switching The cell identifier, the system-related information periodically transmitted by the second network system 120, and the like related to the second network system 120 to the user terminal 100 before the system switching operation, .

The user terminal 100 performs a connection with the second network system 120 (S280) and receives a service from the second network system 120 (S290).

Specifically, the user terminal 100 connects to the second base station apparatus 122 and switches to the second network system 120 based on the system switching command. Here, the user terminal 100 accesses the second base station apparatus 122 by preferentially utilizing the information about the second network system 120 acquired in step S270. The user terminal 100 is provided with a specific service using the second network system 120 connected thereto.

3 is a flowchart illustrating a method of providing a service in a heterogeneous network system according to a second embodiment of the present invention.

The operation of the user terminal 100, the heterogeneous network systems 110 and 120, and the service node 130 for providing services in the heterogeneous network system according to the second embodiment of the present invention. Here, the heterogeneous network systems 110 and 120 may include a first network system 110 and a second network system 120, and may include a subscriber information DB (not shown) for managing subscriber information of the first network and the second network Hour), and the like.

The first network system 110 includes components such as a first base station device 112 and a first core network device 114 and the second network system 120 includes components such as a second base station device 122, A core network device 124, and the like.

In the second embodiment of the present invention, when the user terminal 100 accesses the first network system 110 to receive a service, it exchanges service related information that can be provided in the second network system 120, If it is difficult to provide the service from the first network system 110 to the user terminal 100, the second network system 120 converts the connection of the user terminal 100 into the second network system 120, 110 < / RTI > Hereinafter, a method of providing a service in a heterogeneous network system according to a second embodiment will be described in detail with reference to FIG.

The steps S310 to S350 of FIG. 3 are similar to the steps S210 to S250 of FIG. 1, so a detailed description thereof will be omitted.

The first network system 110 transmits a system switching command that further includes system return information to the user terminal 100 (S360, S370).

Specifically, the first core network device 114 transmits a system switch command to the first base station device 112 to provide a specific service, and the first base station device 112 transmits the received system switch command to the user terminal 100). That is, the first core network device 114 transmits a system switchover command to switch from the first network system 110 to the second network system 120 for reception of a specific service via the first base station device 112, To the terminal (100). Here, the system switch command may include an identifier of a subscriber, a service type, system return information, and the like.

The system return information included in the system switching command means information necessary for the user terminal 100 to perform an operation after switching the system to receive a specific service. For example, the system return information indicates a priority of the system to be used after the user terminal 100 completes the reception of the specific service (whether to stay in the second network system 120 preferentially or to return to the first network system 110) (A time for determining whether or not to return to the first network system 110 before system switching) (a time immediately after the end of the service, a time after a certain time value after the end of the service, a time for not returning, etc.) .

The first network system 110 transmits a system switching command to the user terminal 100 so that the RNC connection release between the first base station apparatus 112 and the user terminal 100 is performed together.

The first network system 110 performs a process of exchanging information with the second network system 120 in order to shorten the time required to switch the system from the first network system 110 to the second network system 120 can do. That is, when the first base station device 112 can collect information about the second base station device 122 adjacent to the first base station device 112, the time when the user terminal 100 accesses the second base station device 122 for system switching The cell identifier, the system-related information periodically transmitted by the second network system 120, and the like related to the second network system 120 to the user terminal 100 before the system switching operation, .

The user terminal 100 performs a connection with the second network system 120 (S280) and receives a service from the second network system 120 (S390).

Specifically, the user terminal 100 connects to the second base station apparatus 122 and switches to the second network system 120 based on the system switching command. Here, the user terminal 100 accesses the second base station apparatus 122 by preferentially utilizing the information about the second network system 120 acquired in step S270. The user terminal 100 is provided with a specific service using the second network system 120 connected thereto.

After the service provided from the second network system 120 is completed, the user terminal 100 determines a return system based on the system return information (S392), and performs reconnection to the determined return system (S394).

Specifically, when receiving the system switching command including the system return information in step S360 and step S370, the user terminal 100 performs an operation after receiving the specific service using the system return information. For example, when the system return information includes the priority of the system, the user terminal 100 determines the system to be connected according to the priority. If the system return information includes a time to determine whether to return, the user terminal 100 determines whether or not to return according to the condition.

4 is a flowchart illustrating a method of providing a service in a heterogeneous network system according to a third embodiment of the present invention.

The operation of the user terminal 100, the heterogeneous network systems 110 and 120, and the service node 130 for providing services in the heterogeneous network system according to the third embodiment of the present invention. Here, the heterogeneous network systems 110 and 120 may include a first network system 110 and a second network system 120, and may include a subscriber information DB (not shown) for managing subscriber information of the first network and the second network Hour), and the like.

The first network system 110 includes components such as a first base station device 112 and a first core network device 114 and the second network system 120 includes components such as a second base station device 122, A core network device 124, and the like.

The third embodiment of the present invention proposes a method of effectively providing a service to the user terminal 100 supporting the Dual Registration function which can be simultaneously connected to the first network system 110 and the second network system 120. [ Hereinafter, with reference to FIG. 4, a method for providing a service in a heterogeneous network system according to the third embodiment will be described in detail.

The user terminal 100 performs registration (Attach or Registration) with the first network system 110 and the second network system 120 (S410 and S420).

Specifically, the user terminal 100 operates in a Dual Registration state in which both the first network system 110 and the second network system 120 perform registration. Herein, the registration of the user terminal 100 may be sequentially processed in the first network system 110 and the second network system 120, but the present invention is not limited thereto and may be simultaneously processed in separate operations.

After the user terminal 100 is registered, the first network system 110 operates in a normal mode and the second network system 120 switches to a MICO (Mobile Initiated Communication Only) mode or a power saving mode (S430) .

Specifically, the user terminal 100 receives a general service through the first network system 110 and receives a specific service through the second network system. Accordingly, the first network system 110 for receiving the general service operates in the normal mode, and the second network system 120 for receiving the specific service is operated in the MICO mode or the power saving mode Switch. In the MICO mode, the user terminal 100 operates in a power saving state without performing an operation for receiving a service in the downlink, and only when the user terminal 100 explicitly requests data transmission, To the network system.

In step S430, the second network system 120 switches to the MICO mode and receives information for switching the second network system 120 back to the normal mode according to the occurrence of the specific service, through the first network system 110 The type of the specific service can be exchanged with the first network system 110 in advance.

The second network system 120 receives the service request signal from the service node 130 in step S440 and confirms the address of the first network system 110 in step S450, (S460).

The service node 130 notifies the second core network apparatus 120 of the occurrence of a specific service related to the second network system 120 by using the service type and the identifier of the subscriber, (124).

Thereafter, the second core network apparatus 124 is connected to the first network system 110 and the second network system 120 through a subscriber information DB (not shown) in which the user terminal 100 is currently registered, Queries the address of the core network device 114, and receives a response signal to the query.

The second core network device 124 transmits a service occurrence message for a specific service to the first core network device 114 using the address of the first core network device 114 received from the subscriber information DB do. Here, the service occurrence message includes information on an identifier for a subscriber, a service type, and the like.

Paging between the user terminal 100 and the first network system 110 is performed to resume communication (S470).

Specifically, when the user terminal 100 is in an idle state, the first core network device 114 performs paging to resume communication of the user terminal 100. That is, the first core network device 114 may transmit a network restart request signal to the user terminal 100 to change the RRC-IDLE state of the user terminal 100 to the RRC-CONNECTED state.

The first network system 110 transmits a mode change command related to the generation of a specific service to the user terminal 100 (S472).

In particular, when the connection between the user terminal 100 and the first network system 110 is resumed, the first core network device 114 transmits the second network system 120 in the MICO mode to the normal mode To the user terminal 100, a mode switching command to notify the user terminal 100 of the necessity of switching.

The user terminal 100 performs control for switching the second network system 120 to the normal mode based on the mode switching command and receives a specific service through the second network system 120 switched to the normal mode (S480). Specifically, the user terminal 100 performs a Tracking Area Update, an Attach process, and the like in order to switch the second network system 120 into the normal mode. After switching to the normal mode, the user terminal 100 transmits a specific service .

In the third embodiment, the case where the user terminal 100 operates in a MICO mode for a specific network system is considered, but the present invention can also be applied to a case where the user terminal 100 operates in a similar power saving mode.

5 is a flowchart illustrating a method of providing a service in a heterogeneous network system according to a fourth embodiment of the present invention.

The operation of the user terminal 100, the heterogeneous network systems 110 and 120, and the service node 130 for providing services in the heterogeneous network system according to the fourth embodiment of the present invention. Here, the heterogeneous network systems 110 and 120 may include a first network system 110 and a second network system 120, and may include a subscriber information DB (not shown) for managing subscriber information of the first network and the second network Hour), and the like.

The first network system 110 includes components such as a first base station device 112 and a first core network device 114 and the second network system 120 includes components such as a second base station device 122, A core network device 124, and the like.

In the fourth embodiment of the present invention, in effectively providing a service to the user terminal 100 supporting the dual registration function which can be simultaneously connected to the first network system 110 and the second network system 120, A method for shortening the time for switching from the system 110 to the second network system 120 is proposed. Hereinafter, a method for providing a service in the heterogeneous network system according to the fourth embodiment will be described in detail with reference to FIG.

Steps S510 to S560 of FIG. 5 are similar to steps S410 to S460 of FIG. 4, and a detailed description thereof will be omitted.

The first network system 110 transmits a network resume request signal to the user terminal 100 for paging while performing a paging process between the user terminal 100 and the first network system 110 in step S570 (S572, S574).

Specifically, when the user terminal 100 is in an idle state, the first core network device 114 performs paging to resume communication of the user terminal 100. That is, the first core network device 114 may transmit a network restart request signal to the user terminal 100 to change the RRC-IDLE state of the user terminal 100 to the RRC-CONNECTED state. Here, the network resume request signal further includes information on a service to be received through the second network system 120, in addition to the information for paging.

The user terminal 100 performs control for switching the second network system 120 to the normal mode based on the network resume request signal and receives the service through the second network system 120 switched to the normal mode (S580).

Specifically, the user terminal 100 accesses the second network system 120 without searching for a network system to be connected based on information on a service to be received through the second network system 120 included in the network resume request signal 120 to the normal mode, and receives the service through the second network system 120 switched to the normal mode.

The user terminal 100 transmits a message for normal reception of the network resume request signal and for the normal mode switching of the second network system 120 to the first network system 110 so that the additional paging process of the first network system 110 (S590).

Specifically, the user terminal 100 normally performs paging according to the network resume request signal, and transmits a message to the first network system 110 that the second network system 120 has been switched to the normal mode. Accordingly, the first network system 110 stops the paging operation regarding the user terminal 100. [

6 is a block diagram schematically illustrating a structure of a user terminal according to an embodiment of the present invention.

The terminal device 600 includes a transmission / reception unit 610 and a control unit 620. Each component of the terminal device 1100 may be implemented as a hardware chip, or may be implemented as software, and a microprocessor may be implemented to execute the functions of the software corresponding to each component.

The transceiver 610 transmits and receives signals to perform communication with other network function nodes, a first base station device, and a second base station device.

The control unit 620 performs registration with the first network device 110. [ When a system switching command for the second network system 120 capable of providing a specific service is received, the controller 620 performs a connection with the second network system 120 to switch the system, And receives a specific service from the system 120. The control unit 620 may also be configured to reconnect to the first network system 110 based on the system return information after the reception of the specific service is completed, Connection can be maintained.

When the controller 620 performs registration with both the first network device 110 and the second network device 120, the controller 620 controls the first network device 110 providing the general service to the normal mode, The second network device 120 providing the service controls the MICO mode or the power saving mode.

The control unit 620 switches the mode of the second network system 120 from the power saving mode to the normal mode and receives the specific service from the second network system 120. [

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined by the appended claims. Modifications will be possible. Therefore, the embodiments of the present invention are not intended to limit the scope of the technical idea of the embodiment of the present invention, but the scope of the technical idea of the embodiment of the present invention is not limited by these embodiments. The scope of protection of the embodiments 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 being included in the scope of the embodiments of the present invention.

Although it is described in FIGS. 2 to 5 that the respective processes are executed sequentially, this is merely illustrative of the technical idea of the embodiment of the present invention. In other words, those skilled in the art will appreciate that various changes and modifications may be made without departing from the essential characteristics of one embodiment of the present invention, 2 to 5 are not limited to the time-series order, since they can be variously modified and modified by being executed in parallel.

2 to 5 can be implemented as computer-readable codes on a computer-readable recording medium. A computer-readable recording medium includes all kinds of recording apparatuses in which data that can be read by a computer system is stored. That is, a computer-readable recording medium includes a magnetic storage medium (for example, a ROM, a floppy disk, a hard disk, etc.), an optical reading medium (for example, CD ROM, And the like). In addition, the computer-readable recording medium may be distributed over a network-connected computer system so that computer-readable code can be stored and executed in a distributed manner.

As described above, the embodiment of the present invention is applied to the field of wireless networks, and when the service is temporarily or continuously impossible for a specific service in a predetermined network system, the service can be provided using the resources of another network system It is a useful invention that produces an effect.

100: User terminal
110: first network system 112: first base station device
114: first core network device
120: second network system 122: second base station device
124: second core network device
610, 710, 810: Transmitting / receiving unit 620, 720, 820:

Claims (8)

A method for providing a service in a heterogeneous network system,
A registration process in which the user terminal performs registration in the first network system;
Wherein the first network system determines whether to provide a specific service by the second network system based on the capabilities of the user terminal, the network environment, and the detailed information of the specific service;
When the first network system determines to provide the specific service to the user terminal through the second network system, the first network system transmits a system switch command to the user terminal in consideration of the capability of the user terminal Transferring system transition process; And
A service receiving step of performing connection with the second network system based on the system switching command at the user terminal and receiving the specific service from the second network system,
/ RTI >
Wherein the registering step further instructs the first network system to provide service related information that can be provided to the user terminal in the second network system. The method according to claim 1,
The registration process includes:
Negotiating the capability of the terminal and the network between the user terminal and the first network system and exchanging information about the second network system for providing the specific service. How to. The method according to claim 1,
The network determination process includes:
Wherein a network capable of providing the specific service among the first network system and the second network system is determined in consideration of the capability of the terminal and the network. The method according to claim 1,
And resumes communication by performing paging between the user terminal and the first network system when the user terminal is in an idle state and transmits the system switch command to the user terminal / RTI > The method according to claim 1,
Wherein the system switching command includes information on a subscriber identifier and a service type,
Wherein if the information of the second network system is additionally included in the system switch command, the service receiving step performs a connection with the second network system based on the information of the second network system. How to provide. The method according to claim 1,
And returning to the first network system or determining the return system to maintain the connection of the second network system when the provision of the specific service from the second network system is terminated,
The method comprising the steps of: The method according to claim 6,
In the system returning process,
And determining the return system of the first network system and the second network system based on the system return information included in the system switch command. A terminal apparatus for receiving a specific service in a heterogeneous network system,
A transmitting and receiving unit for transmitting and receiving signals; And
Performs registration with the first network device and switches the system by performing connection with the second network system when a system switching command for the second network system capable of providing a specific service is received, And a control unit for receiving the specific service from the second network system,
Wherein,
Wherein the first network system further indicates service related information that can be provided in the second network system when the first network system registers with the first network system.

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