KR101795786B1 - Method and Apparatus for Selecting Core Network - Google Patents

Abstract

A method and apparatus for selecting a core network in a mobile communication system are disclosed.
According to an aspect of the present invention, there is provided a method and apparatus for selecting a core network suitable for a type of a user subscription service without re-route in selecting a core network in a mobile communication system have.

Description

TECHNICAL FIELD The present invention relates to a method and apparatus for selecting a core network in a mobile communication system,

The present embodiment relates to a method and apparatus for selecting a core network separately configured according to a type of service subscribed by a user in a mobile communication system.

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

The mobile communication service provider can operate the core network separately for each service for the purpose of easy operation of the system and QoS protection. For example, a mobile communication system may be composed of two core networks. One is a core network (Dedicated Core Network) dedicated to a specific service (for example, IoT) and the other is a core network (core network) commonly used for all other services Common Core Network "). When such a core network is separated and operated, it can efficiently support different requirements for each device and each user. However, when the user terminal device connects to the network, a suitable core network according to the subscription of the user terminal device should be selected.

1 is a flowchart illustrating a conventional core network selection process.

Specifically, FIG. 1 is a technology introduced in the 3GPP Release 13 standard. When a user equipment (UE) accesses a network for the first time, the service information (Usage Type) ≪ / RTI > When the terminal device 10 connects to the network (S110), the base station device (eNodeB, 20) can not select the core network for each service because there is no information about the terminal device, (Attach Request) message (S112). The nodes (MME 1, 30a) of the core network receiving the message transmit the Update Location Request message to the HSS 40 (S 114), and the HSS 40 transmits the Update Location Request message to the home subscriber server Information is received (S116). If the connected core network does not support the subscription service, the MME 1 30a selects another core network (MME 2, 30b) supporting the subscription service (S118) and re-directs the terminal device to another selected core network The NAS request message to the base station apparatus 20 (S120). The subsequent process is the same as the existing Attach / TAU (Tracking Area Update) process.

In the conventional core network selection method, the base station device tries to connect to the arbitrary core network first and detaches the terminal device to another core network, so the connection attempt must be made twice. This has the problem of increasing connection time and overhead. In addition, in the conventional method, when the service to which the user subscribes is not supported by the network, only the default service is provided. Therefore, resources can not be used efficiently and it is difficult to improve the quality of service (QoS) of the user . Some of the causes of these problems are that the Mobility Management Entity (MME) selects the core network and only one service type is allowed for one user.

Embodiments of the present invention provide a method and apparatus for selecting a core network suitable for a type of user subscription service without re-route in selecting a core network in a mobile communication system.

According to an embodiment of the present invention, there is provided a method of operating a base station apparatus for selecting a core network in a mobile communication system, the method comprising: receiving service information subscribed by a user from a service information DB included in the mobile communication system, And a dedicated core network selection step of selecting a dedicated core network used for providing a service of a type to which the user subscribes by using the service information acquired in the service information acquisition step and the service information acquisition step The base station apparatus comprising:

According to an embodiment of the present invention, there is provided a method of operating a terminal device for selecting a core network in a mobile communication system, the method comprising the steps of: A service information acquiring step of acquiring service information usable in selecting a core network from a node of a dedicated core network for a specific service and storing the obtained service information, And a service information transmission step of transmitting the stored service information to the base station when the service information stored in the service information obtaining step is determined to be valid.

According to an embodiment of the present invention, there is provided a method of operating a terminal device for selecting a core network in a mobile communication system, the method comprising: when a location of a terminal device is registered, a Dedicated Core Network A support service information acquiring step of acquiring support service information which is service information for selecting a core network or service information for selecting a core network, And a service information transmission step of transmitting the stored service information to the base station apparatus when the user supports the service subscribed as a result of checking in the service support confirmation step and the service support confirmation step, do.

According to an embodiment of the present invention, in a base station apparatus of a mobile communication system, a base station apparatus of a mobile communication system includes a service information obtaining unit for obtaining service information subscribed by a user from a service information DB or a terminal apparatus included in a mobile communication system, Or the service information for core network selection is acquired from the service information DB, a terminal apparatus identification information obtaining unit for obtaining the identification information of the terminal apparatus from the terminal apparatus, and a service information obtaining unit for obtaining, And a dedicated core network selection unit for selecting a dedicated core network used to provide one type of service.

According to the embodiment of the present invention, in a terminal device of a mobile communication system, when a location registration of a terminal device is successful, service information subscribed by a user or service information for selecting a core network for a specific type of service is transmitted to a specific service- A service information determination unit for determining whether the stored service information is valid in the service information acquisition unit, and a service information determination unit for determining whether the stored service information is valid in the service information acquisition unit, And a service information transmitting unit for transmitting the stored service information to the base station apparatus in the service information obtaining unit.

According to the embodiment of the present invention, in a terminal apparatus of a mobile communication system, when registering a location of a terminal apparatus, support service information for obtaining support service information, which is service information supported by a Dedicated Core Network, A service support confirmation unit for comparing the support service information with the service information previously stored in the terminal device to confirm whether the service subscribed by the user is supported in the dedicated core network, A service information transmitting unit for transmitting previously stored service information to the base station apparatus.

As described above, according to embodiments of the present invention, in selecting a core network in a mobile communication system, a method and apparatus for selecting a core network suitable for a type of a user subscription service without re-route There is an effect to provide.

According to the embodiment of the present invention, there is an effect that the base station apparatus directly performs the core network selection to prevent the core network from being erroneously selected.

According to the embodiment of the present invention, the user terminal device directly performs the core network selection, thereby solving the problem of the related art, and further enhancing the scalability.

According to the embodiment of the present invention, it is possible to prevent a connection time and an increase in message overhead due to erroneous selection of a core network by providing a service type to be supported beforehand, and to provide better QoS to a user.

1 is a flowchart illustrating a conventional core network selection process.
2 is a flowchart illustrating a process of selecting a core network by a base station apparatus according to an embodiment of the present invention.
3 is a flowchart illustrating a process of selecting a core network by a base station apparatus according to another embodiment of the present invention.
4 is a flowchart illustrating a process in which a base station apparatus selects a core network using a separate server according to an embodiment of the present invention.
5 is a flowchart illustrating a process of selecting a core network by a terminal device according to an embodiment of the present invention.
6 is a flowchart illustrating a process of selecting a core network using service information according to an embodiment of the present invention.
FIG. 7 is a flowchart illustrating an operation of a terminal device according to an embodiment of the present invention.
8 is a flowchart illustrating an operation of a terminal according to another embodiment of the present invention.
9 is a schematic configuration diagram of a terminal device and a base station device according to an embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that the term "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.

For the sake of clarity, the present embodiment will mainly be directed to a mobile communication system (Evolved Packet System or Long Term Evolution System) based on the 3GPP Release 13 and Release 14 standards evolving in 3GPP LTE or LTE-Advanced systems , But the present invention is not limited thereto, and can be applied to a next generation mobile / wireless communication system based on another communication system.

A mobile communication system according to an embodiment of the present invention includes a user equipment (UE) 10, a base station device (eNodeB) 20, a mobility management entity (MME) , 30, and a Home Subscriber Server (HSS) 40. [ In Fig. 1, only the components related to the present embodiment are shown, and other components may be further included.

The terminal device 10 may be, for example, a tablet PC, a laptop, a personal computer (PC), a portable multimedia player (PMP), a wireless communication terminal device ), A smart phone (SmartPhone), and a mobile communication terminal device (Mobile Communication Terminal).

The base station apparatus 20 supports an E-UTRAN cell, for example, and can provide an interworking function between the terminal apparatus 10 and an evolved packet core (EPC). The core network includes a SGW (Serving Gateway, not shown), a PGW (Packet Data Network Gateway: PDN GW, not shown), an MME 30, and an HSS 40.

The MME 30 includes a signaling and control function for supporting access to a network connection, network resource allocation, tracking, paging, roaming, and handover of the terminal device 10 . The MME 30 controls control plane functions related to subscriber and session management. The MME 30 also performs functions such as security procedures, terminal-to-network session handling, and idle terminal location management .

The HSS 40 stores subscription information, subscriber identity, and profile. When the terminal device 10 attaches to the network, the HSS 40 transmits subscriber information about the terminal device 10 to the MME 30, .

The problem of the prior art shown in FIG. 1, that is, increase in connection time due to two connection attempts, inefficient use of resources, QoS degradation, and the like can be caused by the following reasons. The MME 30 receives the subscriber information directly from the HSS 40 and selects the core network, and only one service type is allowed for one user.

In order to solve the problems of the prior art, a base station apparatus 20 directly selects a core network according to an embodiment of the present invention. Hereinafter, this will be described in detail with reference to Fig.

2 is a flowchart illustrating a process of selecting a core network using a service information DB according to an embodiment of the present invention.

Since the MME 30 is a core network node, a method of selecting the MME 30 for the core network selection method according to the embodiment of the present invention will be described below as an example for convenience of explanation. The selection of other nodes of the core network, for example SGW or PGW, may then be performed by the MME using the received service information, similar to the base station device selecting the MME.

Referring to FIG. 2, the present embodiment can prevent the base station apparatus 20 from directly acquiring information for selecting the core network, that is, the MME 30, so that a re-route does not occur. Herein, the information for selecting a core network refers to service information subscribed by the user.

The service information to which the user subscribes specifically includes 'slice type information' as a broader concept than the conventional Usage Type. The slice type information is a unit in which a network is logically divided according to a purpose so as to satisfy a specific requirement that varies depending on a user. This is a concept based on a network in which a network slice technology is implemented. Hereinafter, the service information subscribed by the user in the present specification will be understood as a concept including slice type information, and in the case of a system using the Usage Type, the service information can follow the usage type as it is. For example, the service information may have a value that can identify an MTC (Machine Type Communication) or IoT (Internet of Things) service, a Mission Critical service, a voice call service, and a MBB (Mobile Broadband Service).

Referring to FIG. 2, the embodiment of the present invention includes a service information DB 50 in which a service information subscribed by a user is stored, in a mobile communication system. The service information DB 50 is connected to the base station apparatus 20 so that the base station apparatus 20 directly receives the service information without going through the MME 30 and can use it to select the core network. Since the base station device directly selects the core network, the accuracy of the core network selection can also be improved.

The terminal apparatus 10 performs a random access procedure (RACH) on the base station apparatus 20 when the terminal apparatus 10 is initially connected to the base station apparatus 20 or there is no radio resource for signal transmission (S210). An initial process for setting up an RRC connection setup is performed between the terminal device 10 and the base station device 20 (S210).

The terminal device 10 confirms whether or not the use of a dedicated core network (DCN) is required (S212). Here, the dedicated core network refers to a core network used to provide a specific type of service, that is, one of the services described above, for example, and is a network in contrast to a common core network.

When it is necessary to use the dedicated core network, the terminal device 10 transmits the identification information (e.g., IMSI) of the terminal device 10 to the base station device 20 in the RRC message (S214).

The base station apparatus 20 accesses the service information DB 50, transfers the identification information of the terminal apparatus, and transmits a message requesting the service information (for example, slice type information) subscribed by the user (S216). Accordingly, the service information DB 50 delivers the service information mapped to the identification information of the terminal device to the base station device 20 (S218).

The base station apparatus 20 selects a dedicated core network (for example, MME) used to provide the type of service to which the user subscribes using the obtained service information (S220). For example, the base station apparatus 20 searches for an MME ID or MMEGI (MME Group Identifier) corresponding to a part or all of the obtained slice type information, or a separate server (for example, a DSN (Domain Name System) Etc.), the MME can be selected by receiving the MME information by querying the MME using the service information as a parameter.

The base station apparatus 20 transmits an initial UE message including a non-access stratum (NAS) message received from the terminal apparatus 10 to the selected MME 30 (S222). The subsequent process is the same as the existing location registration (Attach / TAU (Tracking Area Update)) process.

In the present invention, the service information DB 50 may be a DB limited to providing service information for selecting a core network, or a DB storing existing user subscription information, for example, an HSS (home subscriber server) authorization, and accounting) servers.

Although the embodiment shown in FIG. 2 can improve the accuracy of the core network selection, it is necessary to supplement the identification information of the terminal device because the identification information of the terminal device is exposed to the base station device and a large number of base station devices and the service information DB are linked. An embodiment according to the present invention will be described with reference to FIG.

3 is a flowchart illustrating a process of selecting a core network by a base station apparatus according to another embodiment of the present invention.

In the present embodiment illustrated in FIG. 3, the terminal device 10 directly obtains the service information to which the user subscribes, and the base station device 20 selects the core network using the service information acquired by the terminal device 10.

Specifically, the core network may be selected using the prior art (e.g., DECOR) (S310). When the attach process of the terminal device 10 is performed with the selected core network (MME) 30 and the attach is accepted, the MME 30 transmits the service subscribed by the user through the NAS accept message Information is provided (S312).

The service information transmitted from the MME 30 to the terminal device 10 is transmitted to the MME 30 as it is in the subscribed service information (e.g., Network Slice Type or Usage Type) received from the HSS 40 , Or may be delivered in the form of other types of information that may be used when selecting an MME that can provide the service, e.g., one or more MMEGIs. Here, the information provided by the MME 30 may include not only information related to the service type such as slice type information but also a validity timer indicating a time when the service information is valid.

The terminal device 10 stores the service information (for example, slice type information) acquired from the previously selected core network in a storage device (not shown) included in the terminal device (S314). Here, the service information may include not only information related to the service type such as slice type information but also a validity timer indicating a time when the service information is valid. Further description of the validity timer will be described later with reference to other drawings.

The terminal apparatus 10 performs a random access procedure (RACH) on the base station apparatus 20 and selects the dedicated core network from the terminal apparatus 10 and the base station apparatus 20 , An initial process for RRC connection setup is performed (S316). Then, the terminal device 10 transmits the stored service information to the base station device 20 through the RRC message (S318). The service information transmitted from the terminal apparatus 10 to the base station apparatus 20 is used by the base station apparatus 20 to select a new dedicated core network (S320).

FIG. 3 illustrates a case where the newly selected MME of the base station apparatus is the same as the previously selected MME. The base station device 10 newly selects the MME 30 and delivers the initial terminal device message including the NAS message to the selected MME 30 (S322). Herein, the initial terminal device message includes slice type information received by the base station device 20 from the terminal device 10, that is, service information. Alternatively, the service information may be directly included in the NAS message transmitted from the terminal device 10 to the MME 30.

The MME 30 having received the initial terminal device message transmits an Update Location Request message including identification information (e.g., IMSI) of the terminal device to the HSS 40 (S324). Accordingly, the HSS 40 extracts service information to which the user subscribes, that is, slice type information allowed in the terminal device 10, and transmits the extracted information to the MME 30 in an Update Location Answer message (S326 ).

The MME 30 may finally determine whether to accept the use of the slice type core network requested from the terminal device 10 using the slice type information received from the HSS 40 in operation S328. The process S328 is a process for preventing an error that may occur when the core network is selected based only on the slice type information stored in the terminal device 10. [ This can improve the accuracy of core network selection.

In the embodiment illustrated in FIG. 3, a reroute does not occur after a network connection occurs even once, but a re-route occurs when an initial network connection is attached. Therefore, an embodiment according to the present invention will be described with reference to FIG.

4 is a flowchart illustrating a process in which a base station apparatus selects a core network using a separate server according to an embodiment of the present invention.

The embodiment of FIG. 4 can compensate the above-described problem by previously setting the service information in the terminal device 10 by using the separate server 60. FIG. In FIG. 4, the service information configuration server 60 is shown as a separate device in the mobile communication system. However, the service information configuration server 60 may be implemented as a device integrated with other components. For example, the service information configured by the service information configuration server 60 may be pre-configured at the time of manufacturing the terminal device 10.

4, the terminal device 10 transmits a service information request message including identification information of the terminal device 10 and characteristic information (e.g., low priority access) of the terminal device 10 to a service information configuration server 60) (S410). The process S410 may be omitted depending on the embodiment and is not an essential process.

The service information configuration server 60 may configure service information suitable for the terminal device 10 and transmit the service information to the terminal device 10 through a service information push message (S412). Likewise, the service information also includes slice type information. The process S412 may be performed using Open Mobile Alliance-Device Management (OMA-DM) technology. In this case, the service information configuration server 60 may transmit the service information using the NAS MO (Management Object).

The terminal device 10 stores the service information acquired from the service information configuration server 60 (S414). When the location registration (Attach / TAU) is required, the terminal apparatus 10 performs a random access procedure (RACH) on the base station apparatus 20 and transmits the RACH to the terminal apparatus 10 and the base station apparatus 20 An initial process for RRC connection setup is performed (S416). If the location registration is required, the terminal device 10 is out of the registered TA (tracking area), is out of the PLMN area, is in use, or detaches from the network, And receiving a command. The terminal device 10 transmits service information (e.g., slice type information) stored in the terminal device 10 to the base station device 20 through the RRC message (S418). The processes S416 and S418 are the same as those described in FIG. 3, and the subsequent processes are also the same.

As described above, in the prior art, only one Usage Type is allowed for a user, and if the use of the joined Usage Type is not possible, there is a problem that a default service is received from the same operator. Such a problem is a factor that deteriorates the efficiency of network use when a network is shared or a terminal device can directly select one of two or more operators. If it is possible to connect to two networks (for example, provider A and provider B), it is effective to select provider B and receive QoS for a dedicated service rather than receiving basic service from provider A to be.

5 is a flowchart illustrating a process of selecting a core network by a terminal device according to an embodiment of the present invention.

The present embodiment according to FIG. 5 can avoid the unnecessary service negotiation process by previously notifying the service information supported by the network before the terminal device 10 performs the authentication / connection process. Also, if necessary, the terminal device 10 can directly connect to another network that provides a better service.

5, the base station apparatus 20 transmits service information (hereinafter referred to as 'support service information') supported by a dedicated core network connected to the base station apparatus 20 to the terminal apparatus 10 (S510 ). In step S510, the base station apparatus 20 may broadcast one or more supporting service information through a system information block (SIB). In another embodiment, in step S510, the base station apparatus 20 may unicast one or more supporting service information through an RRC message. In the case of the unicast method, the base station apparatus 20 selectively configures service information to be delivered to the terminal device 10 in consideration of information (e.g., UE Radio Capability or Device Property) provided by the terminal device 10 . If the terminal device 10 has already received broadcast support service information but receives support service information through unicast after connecting to a specific cell, the terminal device may transmit the information received via unicast during the connection to the cell It should be applied first.

The support service information can be set in the base station apparatus 20 using the OAM function. Or the base station apparatus 20 may be obtained from the MME 30 in the course of performing the S1 setup procedure with the MME 30.

Then, the terminal device 10 compares the support service information acquired from the base station device 20 with the service information stored in the terminal device 10 itself (S512). When the service information stored in the terminal device 10 corresponds to the support service information, the terminal device 10 accesses the corresponding slice type. If not, the terminal device 10 accesses another RAT (Radio Access Technology) or another provider (PLMN: Public Land Mobile Network Identity) (S514). During this process, the terminal device 10 operates in consideration of all of the slice type priority, the RAT selection priority, and the carrier selection priority. The core network connection process is the same as the above-described process.

In this way, the scalability can be improved by the terminal device 10 performing the core network selection directly.

6 is a flowchart illustrating a process of selecting a core network using service information according to an embodiment of the present invention.

The present embodiment illustrated in FIG. 6 exemplifies the case where at least one of service type information to which the service information is applied to the terminal device 10, a validity timer indicating the valid time of the service type information, priority information, and PLMN identification information (PLMN ID) So that a flexible core network can be selected.

Specifically, the service information configuration server 60 can add slice type information, PLMN identification information, and priority information to the service information provided to the terminal device 10 (S610). For example, the following configuration may be used.

PLMN ID X ---- slice type 1 ---- priority 1

          ---- slice type 2 ---- priority 2

The terminal device 10 can obtain the supported service information from the base station device 20 through the SIB or RRC message as described above (S612). The terminal device 10 can select a slice type of a cell to be connected using the service information and the support service information acquired from the service information configuration server 60 (S614).

In step S614, when the terminal device collects the cell information and selects a cell to be connected, the terminal device can select the highest priority slice type having the highest priority among the slice types supported by the connectable cell. In step S614, the PLMN or the RAT to which the terminal device 10 connects may be changed. In order to prevent the frequent change, a timer may be installed in the terminal device 10 to operate. Specifically, when the terminal device 10 starts to receive service from the selected specific slice type, it does not change the slice type until the timer expires except for unavoidable circumstances (such as out of network coverage).

The process from S618 to S626 of FIG. 6 is the same as the process described above, so that the description is omitted.

Hereinafter, an operation method of the terminal device according to the embodiment of the present invention will be described in detail with reference to FIG. 7 and FIG.

FIG. 7 is a flowchart illustrating an operation of a terminal device according to an embodiment of the present invention.

8 is a flowchart illustrating an operation of a terminal according to another embodiment of the present invention.

First, an operation method of the terminal device according to the embodiment shown in FIG. 7 will be described. When the AT (Attach / TAU) message is successfully received (i.e., upon receipt of an Attach / TAU accept message) of the terminal device 10 with respect to the selected dedicated core network, the terminal device 10 transmits the service information or the core network Service information to be used for selecting is received from a node (e.g., MME) of the selected dedicated core network and stored (S710). Here, the service information may include a service type information applied to the terminal device 10, and a validity timer indicating a time when the service type information is valid. The service type information may also be referred to as slice type information.

In step S712, the terminal device 10 can start the validity timer for the stored service type information. When the valid timer expires, it can be determined that the service type information is invalid.

Thereafter, in a case where the location registration is required again according to the movement of the terminal device 10 or the state change (S714, YES), it is determined whether the service information stored in the terminal device 10 is valid (S716). If the location registration is required, the terminal device 10 is out of the registered TA (tracking area), is out of the PLMN area, is in use, or detaches from the network, And receiving a command.

For example, when the service information received from the core network by the terminal device 10 includes PLMN information, the service information is valid only for the corresponding provider. If the PLMN information is not separately included, The service information received only for the PLMN registered by the service provider 10 is considered to be valid.

In step S716, it is determined whether the PLMN identification information of the dedicated core network connected to the existing dedicated core network is the same as the PLMN identification information of the dedicated core network to be newly connected. (Ii) The terminal device 10 is located in a new area (Iii) determining whether there is service information for which the validity timer has not expired among the service information stored in the terminal device 10, and Here, the new area may be either a new TA (Tracking Area), a new RA (Routing Area) or a new PLMN (Public Land Mobile Network).

If it is determined that the stored service information is valid, the terminal device 10 transmits the service information stored when the base station device 20 is connected to the base station device 20 (S718). Specifically, the terminal device 10 may include service information to be transmitted in an RRC Connection Setup Complete message.

After the process S718, the terminal device 10 performs the remaining processes of location registration (S722).

On the other hand, if there is no valid service information as a result of the service information determination, the terminal device 10 operates using the conventional technology (for example, 3GPP Rel-13 DECOR) (S720).

Hereinafter, an operation method of a terminal device according to another embodiment of the present invention will be described with reference to FIG.

 The terminal device 10 acquires and stores the service information (S810). Here, the service information may include at least one of service type information applied to the terminal device 10, a validity timer indicating a time when the service type information is valid, priority information, and PLMN identification information.

In step S810, the terminal device 10 may obtain service information from a node (e.g., MME, SGSN, etc.) of a previously-connected dedicated core network. The terminal device 10 further includes a service information configuration server 60 that configures service information suitable for the terminal device 10 using at least one of the identification information of the terminal device 10 and the characteristic information of the terminal device 10 Service information may be obtained. The service information may be pre-configured in the terminal device 10 according to the embodiment.

After the process S810, when the location registration is required again according to the movement or the state change of the terminal device 10 (S812, YES), the terminal device 10 is connected to the base station device 20 from the neighboring base station device 20 One or more support service information supported by the dedicated core network may be received (S814). Here, the support service information may be broadcast by the base station apparatus 20 through a system information block (SIB). In another embodiment, the supported service information may be unicast through an RRC message. In the case of the unicast method, the base station apparatus 20 can select service information to be delivered to the terminal apparatus 10 in consideration of information (e.g., UE Radio Capability or Device Property) provided by the terminal apparatus 10.

The support service information can be set in the base station apparatus 20 using the OAM function. Or the base station apparatus 20 may be obtained from the MME 30 in the course of performing the S1 setup procedure with the MME 30.

The terminal device 10 compares one or more of the supported service information with the service information stored in the terminal device 10 and confirms whether the user supports the subscription service in the dedicated core network (S816). Specifically, the terminal device 10 can compare the supported service information with the stored service information according to the priority information included in the service information. As a result of comparison, the service information having the highest priority (highest priority service information) among the service information matching the supported service information can be selected and transmitted to the base station apparatus 20 (S818). At this time, the terminal device 10 can include the highest priority service information in the RRC Connection Setup Complete message and transmit it to the base station device 20. Thereafter, the terminal device 10 performs the remaining process of location registration (S822).

If the highest priority service information having the highest priority among the service information stored in the terminal device 10 as the comparison result does not match the support service information (S816, NO), the terminal device 10 transmits another service Other base station device cells may be selected to select the core network (S820). Here, in order to select another base station device cell, the terminal device 10 may change the RAT, the base station device, or the PLMN.

Hereinafter, the terminal device 10 and the base station device 20 according to the embodiment of the present invention will be described with reference to FIG.

9 is a schematic configuration diagram of a terminal device and a base station device according to an embodiment of the present invention.

The base station apparatus 20 of the mobile communication system according to the embodiment of the present invention includes a service information obtaining unit 22, a terminal apparatus identification information obtaining unit 24, and a dedicated core network selecting unit 26. 9 shows only the components related to the present embodiment, and may further include other general components in addition to the components shown in the figures. In FIG. 9, each component is shown as a separate device. However, the present invention is not limited to this, and may be implemented as a single integrated device including all the functions.

The service information acquiring unit 22 acquires the service information subscribed by the user from the service information DB (not shown) or the terminal device 10 included in the mobile communication system.

The terminal device 10 transmits the identification information (e.g., IMSI) of the terminal device 10 to the base station 10 in the RRC message, when the use of the dedicated core network is required. To the device (20). The terminal device identification information obtaining section 24 obtains the identification information of the terminal device delivered by the terminal device 10. [

The base station device 20 accesses the service information DB, delivers identification information of the terminal device, and delivers a message requesting service information (e.g., slice type information) subscribed by the user. Accordingly, the service information obtaining unit 22 obtains service information mapped to the identification information of the terminal apparatus from the service information DB.

The dedicated core network selection unit 26 selects a dedicated core network (e.g., MME) used to provide the type of service to which the user subscribes, using the acquired service information. For example, the dedicated core network selector 26 may search for an MME ID or MMEGI (MME Group Identifier) corresponding to a part or all of the obtained slice type information, or a separate server (for example, a DSN Name System), etc.).

The terminal apparatus 10 according to the embodiment of the present invention includes a service information obtaining unit 12, a service information determining unit 14, and a service information transmitting unit 19. [

The service information obtaining unit 12 obtains and stores the service information subscribed by the user from the pre-selected dedicated core network upon successful registration of the location of the terminal device with respect to the previously selected dedicated core network used to provide the specific type of service . Here, the service information may include a service type information applied to the terminal device 10, and a validity timer indicating a time when the service type information is valid.

When it is necessary to select a new dedicated core network, the service information determination unit 14 determines whether the service information stored in the service information acquisition unit 12 is valid.

The service information determination unit 14 determines whether the new dedicated core network is the same as the pre-selected dedicated core network, (ii) determining whether the new dedicated core network is the same as the already selected dedicated core network, (Iii) a step of determining whether the service information of the terminal device 10 whose valid timer has not expired is the same as that of the terminal device 10 And a step of determining whether or not it exists.

The service information determined by the service information determination unit 14 may be validated again at the core network node that received the location registration request message of the terminal device 10. [

When the service information determining unit 14 determines that the stored service information is valid, the service information transmitting unit 19 transmits the stored service information from the service information obtaining unit 12 to the base station device 20. [ Specifically, the terminal device 10 may include service information to be transmitted in an RRC Connection Setup Complete message.

The terminal device 10 according to another embodiment of the present invention further includes a service information obtaining unit 16 and a service support checking unit 18 in addition to the service information obtaining unit 12 and the service information transmitting unit 19 do.

The service information obtaining unit 12 according to the present embodiment obtains and stores the service information to which the user subscribes. Here, the service information may include at least one of service type information applied to the terminal device 10, a validity timer indicating a time when the service type information is valid, priority information, and PLMN identification information.

The support service information acquisition unit 16 acquires support service information, which is service information supported by the dedicated core network, from the base station apparatus 20 when location registration of the terminal apparatus 10 is required. When the location registration is required, the terminal 10 is out of the registered tracking area (TA), the PLMN area is out of service, the RAT that is in use needs to be changed, or a detach command is received from the network This can be.

The service support confirmation unit 18 compares one or more of the supported service information with the service information stored in the service information acquisition unit 12 to confirm whether or not the user's subscription service is supported in the dedicated core network.

1 to 8 show that the respective processes are sequentially executed, but the present invention is not limited thereto. In other words, the present invention is not limited to the time-series order, since the processes described in FIGS. 1 to 8 may be changed or executed in parallel or one or more processes may be executed in parallel.

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

As described above, the present embodiment is applied to a field for selecting a core network separately configured according to a type of a service to which a user subscribes in a mobile communication system, thereby increasing access time and message overhead without re- But it is a useful invention that produces the effect of providing better QoS to the user.

10: terminal device 20: base station device
30: MME 40: HSS
50: service information DB 60: service information configuration server

Claims (16)

A method of operating a base station apparatus for selecting a core network in a mobile communication system,
A service information acquiring step of acquiring service information subscribed by a user from a terminal device; And
And a dedicated core network selection step of selecting a dedicated core network supporting the type of service to which the user subscribes, using the service information acquired from the terminal device,
Wherein the service information acquired from the terminal device comprises:
And the base station device is stored in the terminal device, and is transmitted to the base station device when registering a new location of the terminal device. delete delete A method of operating a terminal device for selecting a core network in a mobile communication system,
A service information acquiring step of acquiring service information subscribed by a user for a specific type of service from a node of a dedicated dedicated core network and storing the service information when the initial location registration is successful;
A service information determination step of determining, when a new location is registered, whether the stored service information is valid; And
And a service information transmitting step of transmitting the stored service information to the base station apparatus when it is determined that the stored service information is valid in the service information obtaining step,
Wherein the transmitted service information is used when the base station device selects a dedicated core network supporting the service to which the user subscribes. 5. The method of claim 4,
The service information includes:
A valid timer indicating a time when the service type information is valid, and a PLMN (Public Land Mobile Network Identity) identification information. 5. The method of claim 4,
Wherein the service information determination step comprises:
Determining whether PLMN identification information of a dedicated core network connected to an existing core network and a dedicated core network to be newly connected is the same;
Determining whether an effective timer included in the service information has expired; And
And determining whether the terminal device registers a location in a new area that is not an existing registered area. A method of operating a terminal device for selecting a core network in a mobile communication system,
Acquiring support service information (hereinafter, referred to as 'support service information') about a service supported by a Dedicated Core Network connected to the base station apparatus from a base station apparatus when registering a location;
Comparing the support service information with previously stored service information in the terminal device to confirm whether the service subscribed by the user is supported in the dedicated core network; And
And a service information transmitting step of transmitting the pre-stored service information to the base station apparatus when the user supports the subscription service in the dedicated core network,
Wherein the transmitted service information is used when the base station device selects a dedicated core network supporting the service to which the user subscribes. 8. The method of claim 7,
The pre-
Or from a dedicated core network node or a separate server,
Wherein the terminal device is pre-configured in the terminal device. 9. The method of claim 8,
Wherein the separate server comprises:
Wherein at least one of the identification information and the characteristic information of the terminal apparatus is used to form service information suitable for the terminal apparatus. 8. The method of claim 7,
The service information includes:
Wherein the service type information includes at least one of service type information applied to the terminal device, a valid timer indicating a valid time of the service type information, priority information, and PLMN (Public Land Mobile Network Identity) identification information. 8. The method of claim 7,
The service support confirmation step includes:
And comparing the support service information with the pre-stored service information according to priority information included in the service information. 12. The method of claim 11,
The service information transmission step includes:
A service information selection step of selecting, as a comparison result of the service support confirmation step, the highest priority service information having the highest priority among the previously stored service information matching the support service information; And
A transmission step of transmitting the highest priority service information to the base station apparatus
And a terminal device. 12. The method of claim 11,
If it is determined that the highest priority service information having the highest priority among the previously stored service information does not match the support service information as a result of the comparison of the service support confirmation step, And selecting a cell different from a cell of the base station apparatus. delete delete delete

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