WO2020036364A1

WO2020036364A1 - Method and apparatus for discovering and selecting private cellular network by terminal

Info

Publication number: WO2020036364A1
Application number: PCT/KR2019/009918
Authority: WO
Inventors: 백영교; 문상준; 박중신; 이지철
Original assignee: 삼성전자 주식회사
Priority date: 2018-08-13
Filing date: 2019-08-07
Publication date: 2020-02-20

Abstract

The present disclosure relates to a communication technique for convergence of an IoT technology and a 5G communication system for supporting a higher data transmission rate beyond a 4G system, and a system therefor. The present disclosure may be applied to intelligent services (for example, smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail business, security and safety-related services, etc.) on the basis of a 5G communication technology and IoT-related technology. The present invention provides a method and an apparatus for discovering and selecting a private network by a terminal.

Description

Method and apparatus for discovering and selecting a private cellular network by a terminal

The present invention relates to a cellular communication system, and more particularly, to a method and apparatus for a terminal to discover and select a private cellular network.

In order to meet the increasing demand for wireless data traffic since the commercialization of 4G communication system, efforts are being made to develop an improved 5G communication system or a pre-5G communication system. For this reason, a 5G communication system or a pre-5G communication system is called a Beyond 4G network communication system or a post LTE system.

In order to achieve high data rates, 5G communication systems are being considered for implementation in the ultra-high frequency (mmWave) band (eg, such as the 60 Gigabit (60 GHz) band). In 5G communication system, beamforming, massive array multiple input / output (Full-Dimensional MIMO), and full dimensional multiple input / output (FD-MIMO) are used in 5G communication system to increase path loss mitigation of radio waves and increase transmission distance of radio waves. Array antenna, analog beam-forming, and large scale antenna techniques are discussed.

In addition, in order to improve the network of the system, 5G communication systems have advanced small cells, advanced small cells, cloud radio access network (cloud RAN), ultra-dense network (ultra-dense network) , Device to Device communication (D2D), wireless backhaul, moving network, cooperative communication, Coordinated Multi-Points (CoMP), and interference cancellation And other technology developments are being made.

In addition, in 5G systems, Hybrid FSK and QAM Modulation (FQAM) and sliding window superposition coding (SWSC), Advanced Coding Modulation (ACM), and FBMC (Filter Bank Multi Carrier) and NOMA (non orthogonal multiple access), and sparse code multiple access (SCMA), and the like are being developed.

Meanwhile, the Internet is evolving from a human-centered connection network where humans create and consume information, and an Internet of Things (IoT) network that exchanges and processes information between distributed components such as things. Internet of Everything (IoE) technology, in which big data processing technology through connection with cloud servers and the like, is combined with IoT technology, is also emerging. In order to implement the IoT, technical elements such as sensing technology, wired / wireless communication and network infrastructure, service interface technology, and security technology are required, and recently, a sensor network for connection between things, a machine to machine , M2M), Machine Type Communication (MTC), etc. are being studied. In an IoT environment, intelligent Internet technology (IT) services that provide new value in human life by collecting and analyzing data generated from connected objects may be provided. IoT is a field of smart home, smart building, smart city, smart car or connected car, smart grid, health care, smart home appliances, advanced medical services, etc. through convergence and complex of existing information technology (IT) technology and various industries. It can be applied to.

Accordingly, various attempts have been made to apply the 5G communication system to the IoT network. For example, technologies such as sensor network, machine to machine (M2M), machine type communication (MTC), and the like, are implemented by techniques such as beamforming, MIMO, and array antennas. It is. The application of cloud radio access network (cloud RAN) as the big data processing technology described above may be an example of convergence of 5G technology and IoT technology.

For private communication networks operated locally, such as the provision of communication services in smart factories, a private cellular network (or private network) that is locally constructed separately from general public cellular networks (or public networks) is operated. Is considering. In this case, in order for the terminal to use the private cellular network to access and register the private cellular network and use the network, the terminal must first discover and select the private communication network. To this end, it is necessary to identify private networks.

A private cellular network is a type A private network operated by a public cellular network operator in connection with a public cellular network according to its operation method, and a type B type operated by itself or independently of a private cellular network independent of a public cellular network. Cellular networks are divided. Since a method for discovering and selecting a network may vary according to the type of private cellular network, the following proposes an identification scheme for each private cellular network and a method for discovering and selecting a private cellular network. . In addition, a method for restricting access to a private cellular network of terminals using a general public cellular network is also proposed.

In the following description, a private cellular network uses a private network or a non-public network (NPN) in the same meaning, and a private network ID and a non-public network ID may be used in combination. In addition, Type A type cellular network is used interchangeably with public network integrated non public network (PNI NPN), and Type B type cellular network is used interchangeably with standalone non-public network.

A method of a base station according to an embodiment for solving the above-described problems may include first information associated with a public land mobile network (PLMN) identity of a public network, second information for identifying a private network, and a private network. Generating a system information block (SIB) including third information for controlling access of the terminal to the terminal; and transmitting the system information block to the terminal.

According to an embodiment of the present disclosure, a base station identifies a transceiver configured to transmit and receive a signal, first information related to a public land mobile network (PLMN) identity of a public network, and a private network. And a control unit configured to generate a system information block (SIB) including second information for controlling the terminal and third information for controlling access of the terminal to the private network, and to transmit the system information block to the terminal. .

According to an embodiment of the present disclosure, a method of a terminal includes: receiving a system information block (SIB) from a base station, and a PLMN of a public network included in the system information; ) Identifying first information related to identity, second information for identifying a private network, and third information for controlling a connection of a terminal to the private network.

In accordance with an embodiment of the present invention, a method of a terminal includes a transceiver configured to transmit and receive a signal, and a system information block (SIB) received from a base station, and is included in system information. And a control unit configured to identify first information related to a public land mobile network (PLMN) identity of the network, second information for identifying a private network, and third information for controlling access of a terminal to the private network. do.

According to the conventional scheme, when using a communication service through a public cellular network, the terminal identifies the cellular network through a mobile country code (MCC) value and a mobile network code (MCN) value or a public land mobile network (PLMN) ID. However, in the case of Type A private cellular network, additional information such as ID of the private cellular network allocated by the service provider as well as public cellular network information linked together is required for network identification of the terminal. Type B private cellular networks operate separately from public cellular networks, so an identifier for a public cellular network operator is not required for network identification. However, additional information may be required according to regulation policies in each region. Hereinafter, a method for identifying the Type A and Type B private cellular networks is proposed, and through this, a method for discovering a private cellular network and accessing the found private cellular network is proposed, and also for a general public cellular network. By controlling the access of the terminal to be connected, there is an effect of preventing the waste of communication resources of the private cellular network and stably operating the private cellular network.

1 is a diagram illustrating a structure of a type B private network in accordance with a proposed embodiment.

FIG. 2 is a diagram illustrating a structure of a private communication network of type A associated with a proposed embodiment.

3 is a diagram illustrating an identification method for a private communication network in relation to a proposed embodiment.

4 is a diagram illustrating an operation of a terminal that discovers a private communication network and selects a corresponding private communication network in accordance with the proposed embodiment.

FIG. 5 is a diagram illustrating a method of restricting access of a terminal accessing a public communication network through a base station of a private communication network according to the proposed embodiment.

FIG. 6 is a diagram for a method of limiting access of a base station dedicated to a private communication network by a terminal in accordance with the proposed embodiment.

FIG. 7 is a diagram for a method of controlling a base station access of a terminal in a shared base station according to the proposed embodiment.

FIG. 8 is a diagram illustrating an operation of a terminal selected from a standalone non-public network according to the proposed embodiment.

9 is a diagram illustrating the structure of a terminal according to the proposed embodiment.

10 is a diagram illustrating a structure of a base station according to the proposed embodiment.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. At this time, it should be noted that the same components in the accompanying drawings are represented by the same reference numerals as possible. In addition, detailed descriptions of well-known functions and configurations that may blur the gist of the present invention will be omitted.

In describing the embodiments herein, descriptions of technical contents that are well known in the technical field to which the present invention belongs and are not directly related to the present invention will be omitted. This is to more clearly communicate without obscure the subject matter of the present invention by omitting unnecessary description.

For the same reason, in the accompanying drawings, some components are exaggerated, omitted or schematically illustrated. In addition, the size of each component does not reflect the actual size entirely. The same or corresponding elements in each drawing are given the same reference numerals.

Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be embodied in various different forms, and the present embodiments are only provided to complete the disclosure of the present invention and to provide general knowledge in the art to which the present invention pertains. It is provided to fully convey the scope of the invention to those skilled in the art, and the present invention is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

At this time, it will be understood that each block of the flowchart illustrations and combinations of flowchart illustrations may be performed by computer program instructions. Since these computer program instructions may be mounted on a processor of a general purpose computer, special purpose computer, or other programmable data processing equipment, those instructions executed through the processor of the computer or other programmable data processing equipment may be described in the flowchart block (s). It will create means to perform the functions. These computer program instructions may be stored in a computer usable or computer readable memory that can be directed to a computer or other programmable data processing equipment to implement functionality in a particular manner, and thus the computer usable or computer readable memory. It is also possible for the instructions stored in to produce an article of manufacture containing instruction means for performing the functions described in the flowchart block (s). Computer program instructions may also be mounted on a computer or other programmable data processing equipment, such that a series of operating steps may be performed on the computer or other programmable data processing equipment to create a computer-implemented process to create a computer or other programmable data. Instructions for performing the processing equipment may also provide steps for performing the functions described in the flowchart block (s).

In addition, each block may represent a portion of a module, segment, or code that includes one or more executable instructions for executing a specified logical function (s). It should also be noted that in some alternative implementations, the functions noted in the blocks may occur out of order. For example, the two blocks shown in succession may in fact be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending on the corresponding function.

In this case, the term '~ part' used in the present embodiment refers to software or a hardware component such as an FPGA or an ASIC, and '~ part' plays certain roles. However, '~' is not meant to be limited to software or hardware. May be configured to reside in an addressable storage medium or may be configured to play one or more processors. Thus, as an example, '~' means components such as software components, object-oriented software components, class components, and task components, and processes, functions, properties, procedures, and the like. Subroutines, segments of program code, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays, and variables. The functionality provided within the components and the '~' may be combined into a smaller number of components and the '~' or further separated into additional components and the '~'. In addition, the components and '~' may be implemented to play one or more CPUs in the device or secure multimedia card.

Referring to FIG. 1, the structure of a type B type private network 100 is the same as that of a public cellular network. That is, the terminal 110 accesses the 5G core network through 3gpp access, that is, the 5G RAN 120, and the core network authenticates the access management function (AMF) and the terminal, which are responsible for mobility management and registration management of the terminal. This includes entities such as an Authentication Server Function (AUSF) in charge, User Data Management (UDM) for managing subscriptions, Session Management Function (SMF) for session management, and a User Plane Function (UPF) for forwarding user data. Therefore, for a Type B type private communication network, a method different from that of a public cellular network may be used in terms of identity of the terminal and authentication of the terminal.

In addition, a connection to the external Internet network 130 may be possible according to a private communication network, and a firewall may be installed to provide safety from an external connection.

2 is a diagram illustrating a structure of a private communication network of Type A type according to an embodiment of the present invention.

Referring to FIG. 2, the Type A type private network 200 is an interworking structure with the public cellular network 230, in which the private network and the public cellular network are managed by the same carrier. That is, the terminal 210 accesses the 5G core network through 3gpp access, that is, the 5G RAN 220, and the core network is AMFF responsible for mobility management and registration management of the terminal and AUSF, which is responsible for authentication of the terminal, and subscription. It may include the same entity as a public cellular network, such as a UDM managing SDM, an SMF responsible for session management, and an UPF that forwards user data. In addition, since the private cellular network 200 is interworked with the public cellular network 230, the private cellular network 200 and the public cellular network may be linked as a roaming network. Therefore, when the terminal accessing the private cellular network 200 is subscribed to the public cellular network 230, the identity for the terminal and the authentication method for the terminal may be used in the same manner as the public cellular network. Of course, a separate terminal identity and a separate authentication method can be used.

On the other hand, when the terminal 210 accessing the private cellular network 200 is not subscribed to the public cellular network 230, as in the case of the type B type private network of FIG. This method is used such as identity of terminal and separate authentication for terminal.

3 is a diagram illustrating a terminal identification method for a private cellular network according to an embodiment of the present invention.

The 5G-RAN 310 broadcasts identification information on the private cellular network that it serves through a system information block (SIB) message. For example, 5G-RAN (or base station, 310) delivers the identification number for the private cellular network through the SIB # 1 message. The terminal 300 may receive identification information on the private cellular network from the SIB # 1 message, and may check whether the private cellular network is to be selected.

In one embodiment of the identification scheme, the PLMN ID (ie, MCC and MNC) and private network ID, which is an identifier of the private network assigned by the service provider, are used as information of the service provider network corresponding to the case where the private cellular network is a Type A type. It may be used as (310). In this case, the 5G-RAN may further include a private usage indicator indicating the use of the private network in the SIB # 1 or a private network Type A indicator indicating the type A private network. On the other hand, if the private cellular network is a type B type, the private network type B indicator indicating that it is a type B type private network together with an identifier of a private network randomly assigned by the operator of the private cellular network or assigned by local regulation is used as identification information. Can be used (315). Meanwhile, when the terminal 300 receives a private usage indicator or a private network Type A indicator from the information broadcast through the SIB message, or receives a private network ID together with a PLMN ID, the corresponding 5G-RAN is private in Type A. It can be recognized as a cellular network. In addition, the terminal identifies the type B private cellular network serviced by the 5G-RAN through the PLMN ID + private network ID (320).

As another embodiment of the identification scheme, the 5G-RAN may use the MCC information, the MNC information, and the private network ID private network ID as identification information of the private cellular network (325).

In such an embodiment, the local regulator of the region corresponding to the MCC assigns a specific MNC value to a value representing a private network for type B use and does not assign it to a general public cellular network provider.

For example, in Korea where MCC = '450', MNC = '000' may be assigned as a value for a private network for type B use. A private network ID randomly set by a private network manager or a private network ID allocated from a local regulator may be used as identification information of a private network for type B use. In this embodiment, the terminal 300 may identify the type B private cellular network by checking whether the received MNC value is allocated for the type B private cellular network (330).

Here, the local regulator is an MNC value for type B use, and may assign several values according to the use of the private network, and do not assign these values to general public cellular network operators.

As another embodiment of the identification scheme, a specific MCC value or MNC value that is not assigned to a general public cellular network operator regardless of location may be used as an indication indicating a private network for type B use. For example, when the MCC value is set to 999, the terminal 300 recognizes that the cellular network is a type B private network, that is, a standalone non-public network, so that MCC = 999 is set to a standalone non-public network. It can be used as an indication. The MNC value may be arbitrarily set by a private network operator, a value set by a local regulator or a standard for a standalone non-public network, or a value inferred through a private network ID may be used. For example, a partial value of the private network ID or a hash value of the private network ID may be set as the MNC value. In this case, the private cellular network may use a combination of the PLMN ID information allocated for the private network purpose and the identifier private network ID of the private network as identification information for the private network (335). The UE may identify the type B private cellular network by checking whether the received PLMN ID is allocated for type B use (340).

In the case of Type A, 5G_RAN may use the information PLMN ID (ie, MCC and MNC) of the corresponding provider network and the private network ID of the private network allocated by the provider as identification information.

Meanwhile, in the present embodiment and the following embodiments, when broadcasting identification information on a private network through a SIB message, a SIB message delivering a PLMN ID, that is, an MCC value and an MNC value, and a SIB message delivering a private network ID are present. It may be the same SIB message. Alternatively, the SIB message delivering the PLMN ID, that is, the MCC value and the MNC value, and the SIB message delivering the private network ID may be delivered through different SIB messages.

On the other hand, the terminal receives the MCC and MNC value from the information broadcast through the SIB message to check whether or not the MNC value pre-allocated for Type B use in the country using the MCC (330), or the received MCC value Alternatively, it is possible to determine whether the MNC value is a value that is pre-assigned for type B use (340), whether it is a type A private network or a type B private network, and 5G-RAN through MCC + MNC + private network ID. The serving private cellular network is identified (330, 340).

Further, when the received MCC value is 999, the terminal recognizes that it is a type B use, and the terminal identifies the private cellular network through the MNC value or the private network ID.

The terminal identifying the type of the private network through the identification procedure determines the user's ID and network authentication method to be used in the future private network registration step.

4 is a diagram illustrating an operation sequence of a terminal that discovers a private communication network and selects a corresponding private communication network in accordance with the proposed embodiment.

The 5G-RAN of the private cellular network broadcasts identification information on the private cellular network it is servicing through a system information block (SIB) message, etc., and the terminal receives the identification information (410).

Upon receiving the identification information, the terminal may identify the private communication network through the method of the embodiment described with reference to FIG. 3 (415). The UE determines whether the private communication network can be used through identification information of a subscribed private network (for example, MCC + MNC + private network ID) stored in a secure storage for a Universal Subscriber Identification Module (USIM) or a private network (NW). Get to know. When a private network is available and in automatic selection mode, the terminal checks the preferred private and public network selection list stored in the USIM or secure storage for private NW to select whether to select the private network. Determine (420). In this case, the preferred private & public network selection list is a list indicating the priority of selection of a specific network among available private cellular networks and public cellular networks found by the terminal. If the priority of the highest is the terminal operates to select the highest priority private communication network (425).

When the priority of the found private communication network is the highest, the terminal may change the manner of connecting to the private communication network according to the type of the private communication network.

That is, when the private communication network is a Type A type, the terminal is connected to a public cellular network that manages the private communication network so that the terminal can access or a public cellular network that manages the private communication network and has a roaming agreement. It is determined whether or not you are subscribed to the cellular network (430). If you are subscribed to the public cellular network or a public cellular network that has a roaming agreement, or assign a UE ID (eg, SUPI (Subscriber Permanent Identifier)) issued by a public cellular network that has a roaming agreement If received, the terminal may select the private communication network and the terminal may perform registration with the private communication network. In this case, the terminal may register with the private communication network using a UE ID assigned by the public cellular network to which it is subscribed, for example, SUPI or Subscription Concealed Identifier (SUCI).

On the other hand, when the private communication network is a Type B type, or when the terminal is not subscribed to the public cellular network that manages the private communication type A type, or there is no roaming agreement with the public cellular network to which the terminal subscribes, etc. If the terminal cannot access the public cellular network that the terminal subscribes to or issues a UE ID (eg, SUPI) through the private network, the terminal selects the private network or switches to manual selection mode so that the user or the user It may be determined whether the private communication network is selected based on the set value or the information (435).

On the other hand, if the terminal is currently receiving a service by accessing the public cellular network, the terminal may warn that the service may be stopped by selecting the private communication network (440). When the terminal selects the private communication network by the user, the terminal may perform deregistration from the public cellular network when it is registered in the public cellular network (445). When the terminal registers with the private network 450, the terminal may register with the private network using a Private Network UE ID which is a subscriber ID assigned for the private cellular network subscriber (455). ).

Alternatively, instead of the private Network UE ID, the terminal may use the SUPI value, which is the subscriber ID assigned in the subscribed public cellular network, without being encrypted. In addition, according to an encryption rule shared between the terminal and the private cellular network while the terminal joins the private cellular network, the SUPI value, which is a subscriber ID assigned in the public cellular network to which the terminal is subscribed, is encrypted as the ID of the terminal. Registration may be performed in the private communication network (455).

5 is a diagram illustrating a method for restricting access of a general terminal connected to a public communication network through a base station of a private communication network according to an embodiment of the present invention.

The base station or 5G-RAN 520 may be connected to the core network 540 of the public cellular network in addition to the core network 530 of the private cellular network (ie, RAN sharing scenario). In this case, a general terminal trying to access the public cellular network 540 may also attempt to access the base station 520. On the other hand, when the base station 520 is connected only to the core network 530 of the private cellular network, a general terminal accessing the public cellular network 540 should prevent attempts to access the base station 520.

To this end, when the base station 5G-RAN 520 is connected to both the core network 530 of the private cellular network and the core network 540 of the public cellular network as in the former case (550), the base station 520 is connected to the private network. An indication for notifying that all connections to the public network are available may be included in the SIB message and broadcasted (555). For example, the base station may broadcast the SIB message by setting the Connected CN type to “both” (555). Alternatively, the base station may broadcast identification of each of the public network and the private network, that is, two or more PLMN IDs and two or more PLMN IDs + NIDs together in a SIB message. The terminal 510 receiving the SIB message may access a general terminal accessing the public cellular network even if the base station knows that the base station is a 5G-RAN for the private cellular network (560).

On the other hand, when the base station 5G-RAN 520 is connected only to the core network 530 of the private cellular network (565), the base station sets the connected CN type “private NW only” in addition to the identification information of the private cellular network. Do not transmit the SIB message by setting to or do not include the connected CN type in the SIB message (570).

When the terminal receives the access to the private cellular network, the terminal includes a private network access indicator indicating the access to the private cellular network in the RRC setup message (575). For example, the private network access indicator may be a PLMN ID + NID or NID or PLMN ID + CAG ID or a CAG (Closed Access Group) ID or an indication defined for each.

Accordingly, when the base station does not receive a private network access indicator from the terminal, the base station recognizes that the general terminal accessing the public cellular network is connected, rejects the RRC setup (580), and sends an RRC reject message to the terminal. In this case, it may include a cause indicating that connection of a general terminal connecting to the public cellular network is impossible (585).

The general terminal receiving the reject message does not attempt to access the 5G-RAN for a period of time (590).

6 is a diagram illustrating a process of restricting access of a general terminal to a base station dedicated to a private communication network according to another exemplary embodiment. When the base station or 5G-RAN 620 is connected to the core network 630 of the private cellular network to set up the N2 connection (640), the base station 620 is PLMN ID + NID (network ID) as network information for the private network. Or PLMN ID + closed access group ID (CAG ID) in the SIB message and broadcast (645). At this time, the base station should be restricted so that the legacy terminal or the terminal without a non-public network (NPN) function is impossible to access the private network. At this time, the CAG ID is used to indicate that only a terminal having a subscription to the CAG ID can access the CAG ID broadcast network, and is used for the same purpose as the CSG (closed subscriber group) ID used in the LTE system.

On the other hand, the base station is a cell- to prevent the connection of the legacy terminal (for example, the release-15 terminal) or the terminal without the NPN function (for example, the terminal does not support the NPN access function even after the terminal after the release-16) The reserved-other-use bit is included in the SIB message and transmitted so that the legacy terminal or the terminal without the NPN function does not attempt to access the corresponding base station (645). In this case, the cell-reserved-other-use bit received by the terminal 610 is applied to all the PLMNs and NPNs served by the base station or the cell of the base station, and the base station sets the cell-reserved-other-use bit to true. Can be set to send. That is, when the cell-reserved-other-use bit is set to true (or false), the legacy terminal and the terminal without the NPN function do not attempt to access all the PLMNs or NPNs served by the base station or the cell ( 650, 655).

FIG. 7 is a diagram illustrating a method for controlling access to a base station of a terminal from a shared base station according to another exemplary embodiment.

In the case of shared

base stations

720 and 745 shared by a private cellular network (ie, NPN 730) and a PLMN 740 of a public network (ie, RAN sharing), a legacy terminal or a terminal having no NPN function may use a PLMN. It may attempt to access the base station for use. However, these terminals check the PLMN ID (for example, MCC = 999, MNC = 100) among the PLMN ID and NID values broadcasted by the base station for NPN identification, and the PLMN ID (for example, MCC = 999, MNC). It is necessary to prevent an attempt to connect to the network corresponding to 100).

To this end, the base station 720 transmits by including the cell-reserved-another-use bit in the SIB message by PLMN ID, PLMN ID + NID, or PLMN ID + CAG ID, so that each terminal without an NPN function is transmitted. A method of not attempting to access the base station to access a network corresponding to a PLMN ID may be used (750). In this case, the cell-reserved-another-use bit received by the terminal 710 is allocated for each PLMN ID, PLMN ID + NID, or PLMN ID + CAG ID serviced by the base station, and the value is applied for each PLMN or NPN. . That is, when the cell-reserved-another-use bit is set to true (or false), the terminal without the NPN function does not attempt to access the corresponding PLMN ID or PLMN ID + NID (755). Alternatively, only the terminal in the standalone NPN (SNPN) access mode may attempt to access the NPN through the base station according to the value of the cell-reserved-another-use bit (760). Or, it may represent that the NPN-deactivation terminal is allowed to access the PLMN through the base station according to the cell-reserved-another-use bit value (765).

8 is a diagram illustrating an operation of a terminal selected from a standalone non-public network according to another embodiment.

A case in which the base station 815 uses a specific MCC value not assigned to a general public cellular network operator to use as an indication representing a private network for type B use, that is, a standalone non-public network, will be described. In the process of setting up the N2 connection with the standalone non-public network, the base station 815 maps the identification to the standalone non-public network (for example, private network ID or non-public network ID (NPN ID)). The MCC value and the MNC value are transmitted to the AMF 820 of the standalone non-public network. (825) The MCC value is used as a value of 999, indicating that the MCC value is a non-public network, for example. -MNC value not used in public network, randomly selected by operator of private network, selected by local regulator for standalone non-public network, or inferred by private network ID as MNC value do. For example, a partial value of the private network ID or a hash value of the private network ID may be selected as the MNC value.

At this time, the private network operator selects the MCC value and the MNC value to be used as the same value in all RANs of the standalone non-public network. The AMF 820 of the non-public network stores a mapping between the non-public network ID and the received MCC + MNC value (840), a Globally Unique AMF Identifier (GUAMI) value, or a 5G Globally Unique Temporary Identifier (GUTI). When assigning a value, a value corresponding to the PLMN ID part is used as the received MCC value and MNC value (850). In addition, the AMF uses the received MCC value and the MNC value as a value corresponding to the PLMN ID portion included in the tracking area identification (TAI) (850).

Meanwhile, the base station 815 broadcasts an MCC value 999, the selected MNC value, and a non-public network ID supported by the base station through a SIB message (830).

Information broadcasted by the base station may be delivered through different SIB messages. For example, the MCC value 999 and the MNC value abc may be delivered in the SIB # 1 message (830), and the non-public network ID value may be delivered in another SIB #xx message (845).

When the terminal 810 receives the MCC 999 broadcasted by the base station, it recognizes that the corresponding non-public network is standalone and waits for a non-public network ID value broadcasted by the base station (835).

When the terminal receiving the MCC 999 already knows the MNC value broadcasted by the base station, the terminal may not use the non-public network ID value in performing cell selection and reselection.

The terminal knows the MNC value broadcasted by the base station, and when the base station acquires a mapping of the non-public network ID and the MCC + MNC value through the value previously broadcasted by the base station, or the base station from the non-public network ID. If the terminal already knows how to obtain the MNC value, or if the MCC + MNC value for the non-public network allocated by the local regulator is known publicly. If the base station supports a standalone non-public network from the MCC and MNC values broadcasted as described above, and the MCC + MNC values for the non-public network to which the terminal is subscribed are the same, the terminal does not wait for the non-public network ID value. Instead, cell registration and network selection procedures may be performed to attempt registration with the non-public network. In this case, the UE may include the MCC + MNC value received by the UE in the RRC message 860 and the N2 message 870. In addition, the RRC message 860 and the N2 message 870 includes a non-public network ID or a non-public network ID in a registration request message, thereby allowing the terminal to access from the base station or AMF. You can check whether the network is correct.

After receiving the non-public network ID broadcast after step 835, the UE acquires and stores a mapping between the non-public network ID and the MCC + MNC value (855). The UE subscribed to the non-public network includes cell selection and Cell reselection and network selection are performed (855). The terminal selecting the non-public network attempts registration with the network (860). At this time, the terminal includes the MCC + MNC value received by the terminal in the RRC message 860 and N2 message (870). In addition, the RRC message 860 and the N2 message 870 includes a non-public network ID, or a non-public network to which the terminal is to be connected in the base station or AMF by including a non-public network ID in a registration request message. You can check whether is correct.

The base station receiving the registration request message included in the RRC message 860 forwards the received registration request message to the AMF of the corresponding non-public network by referring to the GUAMI or MCC + MNC value received from the terminal ( 865).

9 is a diagram illustrating a structure of a terminal according to an embodiment of the present invention.

Referring to FIG. 9, the terminal may include a transceiver 910, a terminal controller 920, and a storage 930. In the present invention, the terminal controller may be defined as a circuit or application specific integrated circuit or at least one processor.

The transceiver 910 may transmit and receive a signal with another network entity. The transceiver may, for example, receive system information from a base station, and may receive a synchronization signal or a reference signal.

The terminal controller 920 can control the overall operation of the terminal according to the embodiment proposed by the present invention. For example, the terminal controller can control a signal flow between blocks to perform an operation according to the above-described drawings and flowcharts. In detail, the terminal controller may operate to identify and select a private communication network to access the network.

The storage unit 930 may store at least one of information transmitted and received through the transceiver and information generated through the terminal controller.

10 is a diagram illustrating a structure of a base station according to an embodiment of the present invention.

Referring to FIG. 10, the base station may include a transceiver 1010, a base station controller 1020, and a storage 1030. In the present invention, the base station controller may be defined as a circuit or application specific integrated circuit or at least one processor.

The transceiver 1010 may transmit and receive a signal with another network entity. For example, the transceiver may transmit system information to the terminal and may transmit a synchronization signal or a reference signal.

The base station controller 1020 may control the overall operation of the base station according to the embodiment proposed by the present invention. For example, the base station controller may control the signal flow between blocks to perform an operation according to the above-described drawings and flowcharts. Specifically, the base station controller may include the information for controlling whether the terminal is connected according to the type of cellular network to which the base station is connected, and transmit the SIB message.

The storage unit 1030 may store at least one of information transmitted and received through the transceiver and information generated through the base station controller.

The embodiments disclosed in the specification and the drawings above are merely presented specific examples to easily explain the contents of the present invention and help understanding thereof, and are not intended to limit the scope of the present invention. Therefore, the scope of the present invention should be construed that all changes or modifications derived based on the technical idea of the present invention are included in the scope of the present invention in addition to the embodiments disclosed herein.

Claims

In a wireless communication system, a base station connected to a private network (private network or non-public network) and a public network (public network) in a method for transmitting connection-related information to the terminal,

First information related to a public land mobile network (PLMN) identity of the public network, second information for identifying the private network, and third information for controlling access of a terminal to the private network; Generating a system information block (SIB); And

Transmitting the system information block to the terminal.
The method of claim 1,

And the third information prevents a terminal, which is unable to access the private network, from connecting to a network corresponding to the first information.
The method of claim 1,

The third information corresponds to the PLMN ID, the PLMN ID and a network ID (NID), or the PLMN ID and a closed access group (CAG) ID.
The method of claim 1,

The second information includes a PLMN ID and an NID for the private network.
A base station connected to a private network or a public network in a wireless communication system and transmitting connection related information to a terminal,

A transceiver configured to transmit and receive a signal; And

First information related to a public land mobile network (PLMN) identity of the public network, second information for identifying the private network, and third information for controlling access of the terminal to the private network; And a controller configured to generate a system information block (SIB) and to transmit the system information block to the terminal.
The method of claim 5,

The third information is to prevent the terminal that is unable to access the private network from connecting to the network corresponding to the first information.
The method of claim 5,

The third information corresponds to the PLMN ID, the PLMN ID and network ID (NID), or the PLMN ID and a closed access group (CAG) ID.
The method of claim 5,

And the second information includes a PLMN ID and an NID for the private network.
In a wireless communication system, a terminal receives connection-related information from a base station connected to a private network (private network or non-public network) and a public network (public network),

Receiving a system information block (SIB) from the base station; And

First information associated with a public land mobile network (PLMN) identity of the public network included in the system information, second information for identifying the private network, and a terminal for controlling access to the private network; Identifying the third information.
The method of claim 9,

The third information is to prevent the terminal, which is unable to access the private network, from connecting to the network corresponding to the first information.

The third information corresponds to the PLMN ID, the PLMN ID and a network ID (NID), or the PLMN ID and a closed access group (CAG) ID.
The method of claim 9,

Wherein the second information includes a PLMN ID and a NID for the private network.
A terminal for receiving connection-related information from a base station connected to a private network (private network or non-public network) and a public network in a wireless communication system,

A transceiver configured to transmit and receive a signal; And

Receiving a system information block (SIB) from the base station, identifying first information associated with a public land mobile network (PLMN) identity of the public network included in the system information, and identifying the private network. And a control unit configured to identify second information for the third information and third information for controlling the connection of the terminal to the private network.
The method of claim 12,

The third information is to prevent the terminal that cannot be connected to the private network from connecting to the network corresponding to the first information.
The terminal of claim 12, wherein the third information corresponds to the PLMN ID, the PLMN ID and a network ID (NID), or the PLMN ID and a closed access group (CAG) ID.
The method of claim 12,

The second information includes a PLMN ID and an NID for the private network.