CN114375587B

CN114375587B - Terminal

Info

Publication number: CN114375587B
Application number: CN201980100184.XA
Authority: CN
Inventors: 高桥秀明; 闵天杨
Original assignee: NTT Docomo Inc
Current assignee: NTT Docomo Inc
Priority date: 2019-09-20
Filing date: 2019-09-20
Publication date: 2024-04-12
Anticipated expiration: 2039-09-20
Also published as: CN118019145A; CN114375587A; WO2021053827A1

Abstract

The UE (200A) controls access to the network. The UE (200A) sends a message to the network containing a connection establishment cause indicating that the access type to the network is a high reliability or low latency communication compared to other access types.

Description

Terminal

Technical Field

The present invention relates to a terminal that performs access control to a network.

Background

In the third Generation partnership project (3GPP:3rd Generation Partnership Project), long term evolution (LTE: long Term Evolution) has been standardized, LTE-Advanced (hereinafter, LTE-Advanced is also referred to as LTE) for the purpose of further improving the speed of LTE, and further, the fifth Generation mobile communication system (5 th Generation mobile communication system) (also referred to as 5G, new Radio) or (Next Generation (NG)) has been standardized.

In NR, a technique for providing high reliability low delay communication (URLLC: ultra-Reliable and Low Latency Communications) is specified.

In order to provide such URLLC more reliably, a technology using a dedicated mobile communication Network called a Non-Public Network (NPN) instead of using a Public mobile communication Network (PLMN: public Land Mobile Network) has also been studied (Non-patent document 1).

Further, in NR, a technology is also specified in which an NPN-oriented terminal (User Equipment, UE, hereinafter also referred to as NPN-UE) can access a service of a PLMN via NPN or autonomously access a service of a PLMN (non-patent document 2).

Prior art literature

Patent literature

Non-patent document 1: "Private Network Support for NG-RAN", RP-191563,3GPP TSG RAN Meeting#84,3GPP,2019, month 6

Non-patent document 2:3GPP TS 22.261 V16.8.0,3rd Generation Partnership Project; technical Specification Group Services and System Aspects; service requirements for the5G system; stage 1 (Release 16), 3GPP, month 6 of 2019

Disclosure of Invention

However, the above access to the services of the PLMN by the NPN-UE has the following problems. Specifically, in the case where the NPN-UE cannot connect with the NPN due to a malfunction of the NPN or the like, the NPN-UE may request connection with the PLMN.

As described above, when NPN-UEs may be used to provide URLLC and the requested quality of service (QoS) is high, particularly when a plurality of NPN-UEs access to a PLMN (connection request) at once, radio resources and the like are strained, there is a concern that communication to UEs facing the PLMN (hereinafter also referred to as PLMN-UEs) may be adversely affected.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a terminal capable of suppressing adverse effects on communication of other terminals such as PLMN-UE even when the NPN-UE or the like provides URLLC and accesses PLMN.

One aspect of the present disclosure provides a terminal (UE 200A), the terminal (UE 200A) having: a control unit (access control unit 230) that controls access to a network; and a transmitting unit (connection message transmitting unit 240) that transmits a message including a connection establishment cause indicating that the access type to the network is a high-reliability or low-delay communication as compared with other access types, to the network.

Drawings

Fig. 1 is a schematic overall configuration diagram of a wireless communication system 10.

Fig. 2 is a functional block configuration diagram of UE 200A.

Fig. 3 is a functional block configuration diagram of the gNB 100A.

Fig. 4 is a diagram showing an example of communication timing related to establishment of an RRC connection and access control by a terminal (UE 200A) and a network.

Fig. 5 is a diagram showing a structural example of the rrcsetup request.

Fig. 6 is a diagram showing a configuration example of a mapping table used for access control in UE 200A.

Fig. 7 is a diagram showing an example of a hardware configuration of the gNB100A, gNB100B, UE a and the UE 200B.

Detailed Description

The embodiments are described below based on the drawings. The same or similar functions and structures are denoted by the same reference numerals, and description thereof is omitted as appropriate.

(1) Overall outline structure of wireless communication system

Fig. 1 is a schematic overall configuration diagram of a radio communication system 10 according to the present embodiment. The wireless communication system 10 is a wireless communication system according to a 5G New air interface (NR: new Radio).

The wireless communication system 10 may include a plurality of mobile communication networks. Specifically, the wireless communication system 10 includes a Public land mobile Network 20 (Public Land Mobile Network, hereinafter referred to as PLMN 20) and a Non-Public Network 40 (Non-Public Network 40, hereinafter referred to as NPN 40).

The PLMN 20 may be called a public mobile communication network, a public land mobile network, or the like, and the PLMN 20 includes a network node 30 and a radio base station 100A (hereinafter referred to as a gNB 100A). In addition, the PLMN 20 may also be interpreted as an operator (communication operator) providing a service using the PLMN 20.

The network node 30 is a network device constituting the PLMN 20. In particular, the network node 30 may be interpreted as a communication node implementing the functions of access and mobility management functions (AMF: access and Mobility Management Function), session management functions (SMF: session Management Function), and the like.

The gNB100A is a radio base station according to 5G (NR), and performs radio communication according to 5G with a User Equipment 200A (hereinafter referred to as UE 200A) and a User Equipment 200B (hereinafter referred to as UE 200B). The gNB100A is also a network device constituting the PLMN 20, and the gNB100A may implement a part of the functions of the AMF or the SMF instead of the AMF or the SMF.

NPN40 may be referred to as a non-public mobile communication network, a non-public network, a private network, or the like, and NPN40 includes radio base station 100B (hereinafter referred to as gNB 100B).

NPN40 can be developed in various configurations by using both virtual elements and physical elements for the purpose of individual use by private entities such as businesses. Specifically, the Network may be developed as a completely independent Network (SNPN), or may be hosted by the PLMN 20 (host), or may be provided as a Slice (Slice) of the PLMN 20. In addition, NPN may also be referred to as a closed Access group (CAG: closed Access Group).

That is, the wireless communication system 10 (5G system) may support a Non-Public Network (NPN) and support a NPN that provides coverage within a particular geographic area. The 5G system can support NPN of both physical and virtual, and also can support independent work of NPN. On the other hand, the 5G system may provide access to the subscribed PLMN services via NPN or to NPN services selected via PLMN orientation.

Further, the wireless communication system 10 (5G system) supports a mechanism for the NPN-oriented UE 200A to identify and select an NPN.

In the present embodiment, a mobile communication network including the PLMN 20 and the NPN 40 different from the PLMN 20 can be simply expressed as a network. That is, the network may include a PLMN 20 and an NPN 40.

The gNB100A forms cell C10. The gNB100B forms cell C20. PLMN-oriented UE 200B (PLMN-UE) camps on cell C10 and is capable of connecting with the gNB 100A. As described above, NPN-oriented UE 200A (NPN-UE) is able to access PLMN services subscribed to via NPN orientation.

Further, UE 200A camps on cell C20 and is able to connect with gNB 100B. In addition, when access to the selected NPN service via the PLMN is provided, UE 200B can access the NPN service.

The PLMN-oriented UE 200B may be understood as a terminal having a contract with an operator providing a service using the PLMN 20. Further, the NPN-oriented UE 200A may not necessarily be a terminal having a contract with an operator providing a service using the NPN 40, but may also be understood as a terminal allowed to utilize the service using the NPN 40.

In addition, the specific structure of the wireless communication system 10 including the number of gnbs and UEs is not limited to the example shown in fig. 1. Further, the gNB and the UE can support Massive MIMO that generates a beam with higher directivity by controlling wireless signals transmitted from a plurality of antenna elements, carrier Aggregation (CA) that bundles a plurality of Component Carriers (CCs), and Dual Connection (DC) that simultaneously communicates between the UE and two NG-RAN nodes (NG-RAN nodes), respectively, and the like.

(2) Functional block structure of radio communication system

Next, the functional block configuration of the wireless communication system 10 will be described. Specifically, the functional block structures of UE 200A and gNB100A are described.

(2.1)UE 200A

Fig. 2 is a functional block configuration diagram of UE 200A. As shown in fig. 2, the UE 200A includes a radio transmitter 210, a radio receiver 220, an access controller 230, a connection message transmitter 240, and an access class holder 250.

The wireless transmission unit 210 transmits a wireless signal according to the 5G standard. Further, the wireless receiving unit 220 receives a wireless signal according to the standard of 5G.

The access control unit 230 controls access to the network of the UE 200A. Specifically, the access control unit 230 controls access (may also be referred to as connection) of the UE 200A to the PLMN 20 and NPN 40. In the present embodiment, the access control unit 230 constitutes a control unit.

More specifically, the access control unit 230 performs access control to the network in accordance with integrated access control (UAC) specified in 3gpp TS 24.501 and the like.

The access control unit 230 checks (check) a rule (see TS 24.501Table 4.5.2.2) of a table (Mapping table for access categories: mapping table for access class) held by the access class holding unit 250 to determine an access type (may also be referred to as an access class) applicable to the access attempt (atempt) of the UE 200A, and uses an access class matching the restriction (barre) check.

That is, the access control section 230 controls access to the network according to the access type (access class) held by the access class holding section 250.

The access control section 230 performs access control for an access attempt defined by an event list described below.

The UE 200A is in 5GMM-IDLE mode in 3GPP access, and an event requiring transition to 5GMM-CONNECTED mode occurs

UE 200A is in 5GMM-CONNECTED mode via 3GPP access or 5GMM-CONNECTED mode accompanied by an indication of inactivity of radio resource control layer (RRC), and any of predetermined events occurs

The operation related to the access control of the UE 200A will be further described below.

The connection message transmitting unit 240 transmits a message requesting connection to the network. Specifically, the connection message transmitting unit 240 transmits a message including a connection establishment cause (establishment cause) with the network to the network. In the present embodiment, the connection message transmitting unit 240 constitutes a transmitting unit.

The connection message transmitting section 240 may transmit a message including mo (mobile originating) -Data, mo-VoiceCall, mo-VideoCall, mo-SMS (Short Message Service), mps (multimedia priority service) -priorityiaccess, mcs (mission critical service) -priorityiaccess as a connection establishment cause.

In the present embodiment, the connection message transmitting unit 240 may transmit a message including high reliability and low latency communication (URLLC) as a connection establishment cause. That is, the connection message transmitting unit 240 can transmit a message including a connection establishment cause indicating that the access type (access class) to the network is a high-reliability or low-delay communication as compared with other access types, to the network.

In addition, the name of URLLC used as the connection establishment cause (essentially, access type (access category)) may not necessarily be URLLC, and may be a name indicating high reliability or low latency communication, and may be, for example, URLLC service (low latency service)), industrial internet of things service (IIOT) service, high security and/or high reliability service (high security, high reliability service), high QoS service (high QoS service), or the like. That is, any name may be used as long as it indicates a high degree of demand (high demand) at various service levels such as speed (delay), radio quality, and error resistance.

The connection message transmitting unit 240 can transmit an RRC message including the connection establishment cause. Specifically, the connection message transmitting unit 240 can transmit an rrcsetup request including establishment cause of URLLC or the like. The connection message transmitting unit 240 may use another RRC message (e.g., rrcrecon configuration), and may use a message of another layer as long as it can indicate that the access type is URLLC.

The timing of transmitting the message (specifically, the connection establishment cause) is not particularly limited, and may be any timing from the start to the completion of the connection procedure with the network, or may be after the connection with the network is completed. In particular, in the present embodiment, when the UE 200A transitions from the NPN 40 to the PLMN 20, the connection message transmitting unit 240 can transmit a message including the connection establishment cause to the PLMN 20.

The access category holding unit 250 holds information on the access category. The access category may be referred to as an access type (type) or the like as described above.

Specifically, the access class holding unit 250 holds a table defined in TS 24.501Table 4.5.2.2 (Mapping table for access categories, see fig. 6).

The table contains URLLC as a new access category. In the present embodiment, the access class holding section 250 constitutes a holding section that holds an access type (access class) associated with high-reliability or low-delay communication.

(2.2)gNB100A

Fig. 3 is a functional block configuration diagram of the gNB 100A. As shown in fig. 3, the gNB100A includes a wireless transmitting unit 110, a wireless receiving unit 120, a connection processing unit 130, and an access limiting unit 140.

The wireless transmission unit 110 transmits a wireless signal according to the 5G standard. Further, the wireless receiving unit 120 receives a wireless signal according to the standard of 5G.

The connection processing unit 130 performs processing related to connection with the UE 200A (and the UE 200B, which will be described later). Specifically, the connection processing unit 130 performs processing related to connection (RRC connection) in the RRC layer.

The connection processing unit 130 sets a radio bearer (signaling radio bearer (SRB: signalling Radio Bearer) and data radio bearer (DRB: data Radio Bearer)) via a channel set with the UE 200A, and the connection processing unit 130 performs transmission and reception of a protocol data unit (PDU: protocol Data Unit) and a service data unit (SDU: service Data Unit), specifically, performs assembly and disassembly of PDUs/SDUs in a plurality of layers (medium access control layer (MAC), radio link control layer (RLC), packet data convergence protocol layer (PDCP), and the like.

In addition, the channels include control channels and data channels. The control channels include PDCCH (Physical Downlink Control Channel: physical downlink control channel), PUCCH (Physical Uplink Control Channel: physical uplink control channel), PRACH (Physical Random Access Channel: physical random access channel), PBCH (Physical Broadcast Channel: physical broadcast channel), and the like.

The data channel includes PDSCH (Physical Downlink Shared Channel: physical downlink shared channel), PUSCH (Physical Uplink Shared Channel: physical uplink shared channel), and the like.

In addition, the Reference signals include demodulation Reference signals (DMRS: demodulation Reference Signal), sounding Reference signals (SRS: sounding Reference Signal), phase tracking Reference signals (PTRS: phase Tracking Reference Signal), and channel state information Reference signals (CSI-RS: channel State Information-Reference Signal). The signals include control signals of channels, RRC layers, etc., and reference signals. Further, the data refers to data transmitted via a data channel.

The access restriction unit 140 restricts access to the network by the UE 200A. Specifically, the access restriction section 140 performs access restriction according to the UAC specified in 3gpp ts24.501 and the like.

More specifically, the access restriction unit 140 obtains an access category to which the access restriction is applied, based on a plurality of access categories defined in the network.

The access restriction unit 140 may acquire an access class to which the access restriction is applied from the network node 30, or may determine the access class to which the access restriction is applied at its own discretion based on the load status of the gNB100A or the like. In addition, the access categories to which the access restriction is applied may be one or a plurality of.

The access restriction unit 140 broadcasts the acquired access category in the cell C20. Specifically, the access restriction unit 140 uses system information (i.e., a system information block (SIB: system Information Block)) to broadcast the acquired access category in the cell C20.

The type of SIB used for the broadcast is not particularly limited, and uac-barrennifo contained in SIB1 can be typically used.

(3) Operation of a wireless communication system

Next, an operation of the wireless communication system 10 will be described. Specifically, the application of access restriction in the network and the operation of the terminal based on the access restriction related to access control will be described.

(3.1) outline of the action

First, an outline of the operation to be performed in the present embodiment will be described. When an NPN-UE (UE 200A) cannot connect to the NPN 40 due to a failure or the like of the NPN 40, when a plurality of NPN-UEs access to the PLMN (connection request) at the same time, the PLMN-UE (UE 200B) may be adversely affected.

In particular, NPN-UEs may be used to provide URLLC and the requested quality of service (QoS) is higher, and the tendency for the required radio resources to increase is stronger. Therefore, when access of the NPN-UE is allowed indefinitely, there may be a problem that it is difficult for the PLMN-UE to start a random access procedure using the RACH, or the like.

More specifically, when the NPN-UE has a contract (normal contract) that enables access to the PLMN 20, the NPN-UE can perform RRC connection with the PLMN 20. In the case where a plurality of NPN-UEs used to provide URLLC request a high quality of service (QoS) at once, in order to suppress the above-described adverse effects, access restriction by UAC is preferably applied.

Thus, the present embodiment suppresses adverse effects on the NPN-UE used to provide the URLLC by inheriting the mechanism of the UAC and effectively restricting access to the network (PLMN 20) by the NPN-UE.

Specifically, a new access class (high reliability low latency communication) is defined, and access requests of UEs are controlled according to UACs.

The new access class (high reliability, low latency communication) is located as a class of "need to support very low latency and availability of very high communication services". This means very high reliability. The overall service delay depends on the delay of the wireless interface, transmission within the 5G system, transmission to a server located outside the 5G system, data processing, and the like.

As a scenario where such a need to support very low latency and availability of very high communication services, there may be mentioned motion control, discrete automation (discrete automation), automation of processes, automation of power distribution, intelligent transportation systems, remote control, railroad communication, AR (Augmented Reality: augmented Reality)/VR (Virtual Reality) and the like.

(3.2) detailed actions

Fig. 4 shows an example of communication timing related to establishment of an RRC connection and access control by a terminal (UE 200A) and a network.

As shown in fig. 4, UE 200A (NPN-UE) transmits an rrcsetup request to the network (here, it is assumed that migration (cell reselection) from NPN 40 to PLMN 20).

The rrcsetup request contains the connection establishment cause (establishment cause) of the RRC connection.

Fig. 5 shows a structural example of the rrcsetup request. As shown in fig. 5, the rrcsetup request contains establishment cause. In particular, in the present embodiment, a URLLC service (see an underlined part) indicating high reliability and low latency communication is specified.

UE 200A transmits an rrcsetup request with a URLLC service set as a connection establishment cause.

The network (PLMN 20) performs an RRC connection establishment procedure according to the received rrcsetup request, and establishes an RRC connection with the UE 200A (S20 to S40). Further, setting (not shown in fig. 4) of SRB, DRB, and the like is performed, and UE 200A starts communication via the network.

The network (PLMN 20) is capable of initiating access restrictions based on congestion conditions of the network, etc. Here, the network targets the URLLC service and initiates the access restriction.

The network (PLMN 20) sets URLLC service for uac-access category of uac-barrennifo contained in SIB1, and this SIB1 containing uac-barrennifo is transmitted toward UE 200A (S50).

As described above, since the access restriction is applied for each access category, although the URLLC service performed by the UE 200A is the subject of the access restriction, other services (e.g., mo-Data, mo-VoiceCall, etc.) are not the subject of the access restriction.

The UE 200A performs access control according to the content of uac-barrennifo contained in the received SIB1 (S60).

Fig. 6 shows a configuration example of a mapping table used for access control in UE 200A. Specifically, fig. 6 shows a configuration example of Mapping table for access categories defined in 3GPP TS24.501 Table 4.5.2.2.

As shown in fig. 6, the mapping table contains URLLC as an access category.

As described above, when the UE 200A needs to access the 5G system, it initially performs an access control check to determine whether or not access is allowed. In order to determine the access class that can be applied to the access attempt (attempt), the UE 200A checks the rules of the mapping table, using an access class consistent with the restriction (barreng) check.

In addition, when the access attempt matches a plurality of rules, the access category with the smallest rule number is selected. Further, in case the access attempt coincides with the access class definition defined by the plurality of operators, the UE may select the access class from the access class definitions defined by the operators having the lowest priority values.

(4) Action and Effect

According to the above embodiment, the following operational effects can be obtained. Specifically, UE 200A (as is UE 200B) can send a message (rrcsetup request) to network (PLMN 20) containing a connection establishment cause (establishment cause), which (establishment cause) indicates that the access type (access class) to network (PLMN 20) is a high reliability or low latency communication (URLLC) compared to other access types.

Thus, the network (specifically, the gNB 100A) is able to identify a situation where the UE 200A (NPN-UE) accesses the PLMN20 in order to provide URLLC. Thus, the network can effectively restrict the URLLC service, which is highly prone to increase in required radio resources, with higher requested quality of service (QoS) as needed.

That is, according to UE 200A (and gNB 100A), even when an NPN-UE or the like provides URLLC and accesses PLMN, adverse effects on communication of other terminals such as PLMN-UE can be suppressed.

In the present embodiment, the UE 200A can control access to the network according to the held access type (specifically, the mapping table shown in fig. 6). The mapping table contains URLLC as described above, so UE 200A can realize reliable access control targeting URLLC. This can reliably suppress adverse effects on communication by other terminals such as PLMN-UE.

In the present embodiment, as described above, in particular, access restriction and access control are performed with an NPN-UE that provides URLLC as an object. Therefore, even when the NPN-UE is moved to the PLMN 20, access accompanied by the URLLC by the NPN-UE can be reliably restricted. This can more reliably suppress adverse effects on communication by other terminals such as PLMN-UE.

(5) Other embodiments

While the present invention has been described with reference to the embodiments, it will be apparent to those skilled in the art that the present invention is not limited to these descriptions, but various modifications and improvements can be made.

For example, in the above-described embodiment, the access restriction and the access control are described with respect to the UE 200A that provides the URLLC NPN 40 (non-public mobile communication network), but the access restriction and the access control may be performed with respect to the PLMN-UE, not necessarily the NPN-UE, as long as the terminal provides the URLLC, i.e., the high-reliability low-delay communication.

Similarly, in the above-described embodiment, the case where NPN-UE is migrated to PLMN 20 has been described as an example, but the above-described access restriction and access control may be applied also in the case where, for example, an operator migrates between different PLMNs.

The block diagrams (fig. 2 and 3) used in the description of the above embodiments show blocks in units of functions. These functional blocks (structures) are realized by any combination of at least one of hardware and software. The implementation method of each functional block is not particularly limited. That is, each functional block may be realized by using one device physically or logically combined, or may be realized by directly or indirectly (for example, by using a wire, a wireless, or the like) connecting two or more devices physically or logically separated from each other, and using these plural devices. The functional blocks may also be implemented by combining software with the above-described device or devices.

Functionally, there are judgment, decision, judgment, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, establishment, comparison, assumption, expectation, view, broadcast (broadcasting), notification (notification), communication (communication), forwarding (forwarding), configuration (reconfiguration), reconfiguration (allocating, mapping), assignment (assignment), and the like, but not limited thereto. For example, a functional block (configuration unit) that causes transmission to function is referred to as a transmitter (transmitting unit) or a transmitter (transmitter). In short, the implementation method is not particularly limited as described above.

The above-described gNB100A, gNB100B, UE a and UE 200B (the apparatus) may also function as a computer that performs the processing of the wireless communication method of the present disclosure. Fig. 7 is a diagram showing an example of a hardware configuration of the apparatus. As shown in fig. 7, the device may be configured as a computer device including a processor 1001, a memory 1002 (memory), a storage 1003 (storage), a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

In addition, in the following description, the term "means" may be replaced with "circuit", "device", "unit", or the like. The hardware configuration of the apparatus may be configured to include one or more of the illustrated apparatuses, or may be configured to include no part of the apparatus.

The functional blocks of the apparatus (see fig. 2 and 3) are realized by any hardware elements or a combination of the hardware elements of the computer apparatus.

In addition, each function in the device is realized by the following method: predetermined software (program) is read into hardware such as the processor 1001 and the memory 1002, and the processor 1001 performs an operation to control communication by the communication device 1004 or to control at least one of reading and writing of data in the memory 1002 and the memory 1003.

The processor 1001 controls the entire computer by, for example, operating an operating system. The processor 1001 may be configured by a central processing unit (CPU: central Processing Unit) including an interface with peripheral devices, a control device, an arithmetic device, a register, and the like.

Further, the processor 1001 reads out a program (program code), a software module, data, or the like from at least one of the memory 1003 and the communication device 1004 to the memory 1002, and executes various processes accordingly. As the program, a program that causes a computer to execute at least a part of the operations described in the above embodiments is used. In addition, although the above-described various processes are described as being executed by one processor 1001, the above-described various processes may be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may also be mounted by more than one chip. In addition, the program may also be transmitted from the network via a telecommunication line.

The Memory 1002 is a computer-readable recording medium, and may be constituted by at least one of a Read Only Memory (ROM), an erasable programmable ROM (EPROM: erasable Programmable ROM), an electrically erasable programmable ROM (EEPROM: electrically Erasable Programmable ROM), a random access Memory (RAM: random Access Memory), and the like. The memory 1002 may also be referred to as a register, a cache, a main memory (main storage), or the like. The memory 1002 can store programs (program codes), software modules, and the like capable of executing the methods according to one embodiment of the present disclosure.

The memory 1003 is a computer-readable recording medium, and may be configured of at least one of an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a Floppy disk, a magneto-optical disk (for example, a compact disk, a digital versatile disk, a Blu-ray (registered trademark) disk, a smart card, a flash memory (for example, a card, a stick, a Key drive), a flowpy (registered trademark) disk, a magnetic stripe, and the like), for example.

The communication device 1004 is hardware (transceiver) for performing communication between computers via at least one of a wired network and a wireless network, and may be referred to as a network device, a network controller, a network card, a communication module, or the like, for example.

The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, and the like, for example, in order to realize at least one of frequency division duplexing (FDD: frequency Division Duplex) and time division duplexing (TDD: time Division Duplex).

The input device 1005 is an input apparatus (for example, a keyboard, a mouse, a microphone, a switch, a key, a sensor, or the like) that receives an input from the outside. The output device 1006 is an output apparatus (for example, a display, a speaker, an LED lamp, or the like) that performs output to the outside. The input device 1005 and the output device 1006 may be integrally formed (for example, a touch panel).

The processor 1001 and the memory 1002 are connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus or may be configured using a different bus for each device.

The device may be configured to include hardware such as a microprocessor, a digital signal processor (Digital Signal Processor:dsp), an application specific integrated circuit (asic: application Specific Integrated Circuit), a programmable logic device (pld: programmable Logic Device), and a field programmable gate array (fpga: field Programmable Gate Array), or may be configured to implement a part or all of the functional blocks by the hardware. For example, the processor 1001 may also be installed using at least one of these hardware.

In addition, the notification of information is not limited to the form/embodiment described in the present disclosure, but may be performed using other methods. For example, the notification of the information may be implemented by physical layer signaling (e.g., DCI (Downlink Control Information: downlink control information), UCI (Uplink Control Information: uplink control information)), higher layer signaling (e.g., RRC (Radio Resource Control: radio resource control) signaling, MAC (Medium Access Control: medium access control) signaling, broadcast information (MIB (Master Information Block: master information block), SIB (System Information Block: system information block)), other signals, or a combination thereof.

The various forms/embodiments described in the present disclosure may also be applied to at least one of LTE (Long Term Evolution: long term evolution), LTE-a (LTE-Advanced), upper 3G, IMT-Advanced, fourth generation mobile communication system (4th generation mobile communication system:4G), fifth generation mobile communication system (5th generation mobile communication system:5G), future wireless access (Future Radio Access: FRA), new air interface (New Radio: NR), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, ultra mobile broadband (Ultra Mobile Broadband: UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-wide), bluetooth (registered trademark), systems using other suitable systems, and next generation systems extended accordingly. Further, a plurality of systems (for example, a combination of 5G and at least one of LTE and LTE-a) may be applied in combination.

The processing procedure, sequence, flow, and the like of each form/embodiment described in the present disclosure can be replaced without contradiction. For example, for the methods described in this disclosure, elements of the various steps are presented using an illustrated order, but are not limited to the particular order presented.

The specific actions performed by the base station in the present disclosure are sometimes performed by its upper node (upper node) according to circumstances. In a network comprising one or more network nodes (network nodes) having a base station, it is apparent that various operations performed for communication with a terminal may be performed by the base station and at least one of the other network nodes (for example, MME or S-GW, etc. are considered but not limited thereto) other than the base station. In the above, the case where one other network node other than the base station is illustrated, but the other network node may be a combination of a plurality of other network nodes (for example, MME and S-GW).

Information, signals (information, etc.) can be output from a higher layer (or lower layer) to a lower layer (or higher layer). Or may be input or output via a plurality of network nodes.

The input or output information may be stored in a specific location (e.g., a memory), or may be managed using a management table. The input or output information may be overwritten, updated or recorded. The outputted information may also be deleted. The entered information may also be sent to other devices.

The determination may be performed by a value (0 or 1) represented by 1 bit, may be performed by a Boolean value (true or false), or may be performed by a comparison of values (e.g., a comparison with a predetermined value).

The various forms and embodiments described in this disclosure may be used alone, in combination, or switched depending on the implementation. Note that the notification of the predetermined information is not limited to being performed explicitly (for example, notification of "yes" or "X"), and may be performed implicitly (for example, notification of the predetermined information is not performed).

With respect to software, whether referred to as software, firmware, middleware, microcode, hardware description language, or by other names, should be broadly interpreted to refer to a command, a set of commands, code, a code segment, program code, a program (program), a subroutine, a software module, an application, a software package, a routine, a subroutine, an object, an executable, a thread of execution, a procedure, a function, or the like.

In addition, software, commands, information, etc. may be transmitted and received via a transmission medium. For example, in the case where software is transmitted from a web page, server, or other remote source using at least one of a wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL: digital Subscriber Line), etc.) and a wireless technology (infrared, microwave, etc.), at least one of the wired and wireless technologies is included within the definition of transmission medium.

Information, signals, etc. described in this disclosure may also be represented using any of a variety of different technologies. For example, data, commands, instructions (commands), information, signals, bits, symbols, chips (chips), and the like may be referenced throughout the above description by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or photons, or any combination thereof.

In addition, the terms described in the present disclosure and the terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, at least one of the channel and the symbol may be a signal (signaling). In addition, the signal may also be a message. In addition, the component carrier (CC: component Carrier) may be referred to as a carrier frequency, a cell, a frequency carrier, or the like.

The terms "system" and "network" as used in this disclosure may be used interchangeably.

In addition, information, parameters, and the like described in this disclosure may be expressed using absolute values, relative values to predetermined values, or other information corresponding thereto. For example, radio resources may also be indicated by an index.

The names used for the above parameters are non-limiting in any respect. Further, the numerical formulas and the like using these parameters may also be different from those explicitly disclosed in the present disclosure. The various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by appropriate names, and thus the various names assigned to these various channels and information elements are not limiting in any respect.

In the present disclosure, terms such as "Base Station", "radio Base Station", "fixed Station", "NodeB", "eNodeB (eNB)", "gndeb (gNB)", "access point", "transmission point (transmission point)", "reception point", "transmission point", "reception point", "cell", "sector", "cell group", "carrier", "component carrier", and the like may be used interchangeably. A base station is also sometimes referred to as a macrocell, a microcell, a femtocell, a picocell, or the like.

A base station can accommodate one or more (e.g., 3) cells (also referred to as sectors). In the case of a base station accommodating multiple cells, the coverage area of the base station can be divided into multiple smaller areas, each of which can also provide communication services through a base station subsystem, such as a small base station for indoor use (RRH: remote Radio Head (remote radio head)).

The term "cell" or "sector" refers to a part or the whole of a coverage area of at least one of a base station and a base station subsystem that perform communication services within the coverage area.

In the present disclosure, terms such as "Mobile Station (MS)", "User terminal", "User Equipment (UE)", and "terminal" may be used interchangeably.

For mobile stations, those skilled in the art are sometimes referred to by the following terms: a subscriber station, mobile unit (mobile unit), subscriber unit, wireless unit, remote unit, mobile device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, or some other suitable terminology.

At least one of the base station and the mobile station may be referred to as a transmitting apparatus, a receiving apparatus, a communication apparatus, or the like. At least one of the base station and the mobile station may be a device mounted on the mobile body, the mobile body itself, or the like. The mobile body may be a vehicle (e.g., an automobile, an airplane, etc.), a mobile body that moves unmanned (e.g., an unmanned aerial vehicle, an autopilot, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station also includes a device that does not necessarily move during a communication operation. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things: internet of things) device of a sensor or the like.

In addition, the base station in the present disclosure may be replaced with a mobile station (user terminal, the same applies hereinafter). For example, the various aspects and embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a mobile station is replaced with communication between a plurality of mobile stations (for example, D2D (Device-to-Device), V2X (Vehicle-to-Everything system), etc.), or a configuration in which a mobile station has a function of a base station.

Likewise, the mobile station in the present disclosure may be replaced with a base station. In this case, the base station may have a function of the mobile station.

A radio frame may be made up of one or more frames in the time domain. In the time domain, one or more of the frames may be referred to as subframes.

A subframe may also be composed of one or more slots in the time domain. A subframe may be a fixed length of time (e.g., 1 ms) independent of a parameter set (numerology).

The parameter set may be a communication parameter applied to at least one of transmission and reception of a certain signal or channel. The parameter set may represent, for example, at least one of a subcarrier spacing (SCS: subCarrier Spacing), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (TTI: transmission Time Interval), a number of symbols per TTI, a radio frame structure, a specific filtering process performed by the transceiver in the frequency domain, a specific windowing process performed by the transceiver in the time domain, and the like.

A slot may be formed in the time domain from one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing: orthogonal frequency division multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access: single carrier frequency division multiple access) symbols, etc.). A slot may be a unit of time based on a set of parameters.

A slot may contain multiple mini-slots. Each mini-slot may be made up of one or more symbols in the time domain. In addition, the mini-slots may also be referred to as sub-slots. Mini-slots may be made up of a fewer number of symbols than slots. PDSCH (or PUSCH) transmitted in units of time greater than the mini-slot may be referred to as PDSCH (or PUSCH) mapping type (type) a. PDSCH (or PUSCH) transmitted using mini-slots may be referred to as PDSCH (or PUSCH) mapping type (type) B.

The radio frame, subframe, slot, mini-slot, and symbol each represent a unit of time when a signal is transmitted. The radio frame, subframe, slot, mini-slot, and symbol may each use corresponding other designations.

For example, 1 subframe may be referred to as a transmission time interval (TTI: transmission Time Interval), a plurality of consecutive subframes may also be referred to as TTIs, and 1 slot or 1 mini slot may also be referred to as TTIs. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in the conventional LTE, may be a period (e.g., 1-13 symbols) shorter than 1ms, or may be a period longer than 1 ms. In addition, the unit indicating the TTI may be not a subframe but a slot, a mini slot, or the like.

Here, TTI refers to, for example, a scheduled minimum time unit in wireless communication. For example, in the LTE system, a base station performs scheduling for allocating radio resources (bandwidth, transmission power, and the like that can be used for each user terminal) to each user terminal in TTI units. In addition, the definition of TTI is not limited thereto.

The TTI may be a transmission time unit of a data packet (transport block), a code block, a codeword, or the like after channel coding, or may be a processing unit such as scheduling or link adaptation. In addition, when a TTI is given, a time interval (for example, the number of symbols) in which a transport block, a code block, a codeword, or the like is actually mapped may be shorter than the TTI.

In addition, in the case where 1 slot or 1 mini slot is referred to as a TTI, more than one TTI (i.e., more than one slot or more than one mini slot) may constitute a minimum time unit of scheduling. Further, the number of slots (mini-slots) constituting the minimum time unit of the schedule can be controlled.

TTIs with a time length of 1ms are also referred to as normal TTIs (TTIs in LTE rel.8-12), normal TTI (normal TTI), long TTIs (long TTIs), normal subframes (normal subframes), long (long) subframes, time slots, etc. A TTI that is shorter than a normal TTI may be referred to as a shortened TTI, a short TTI (short TTI), a partial or fractional TTI, a shortened subframe, a short (short) subframe, a mini-slot, a sub-slot, a slot, etc.

In addition, for long TTIs (long TTIs) (e.g., normal TTIs, subframes, etc.), a TTI having a time length exceeding 1ms may be substituted, and for short TTI (short TTI) (e.g., shortened TTI, etc.), a TTI having a TTI length less than the long TTI (long TTI) and having a TTI length greater than 1ms may be substituted.

A Resource Block (RB) is a resource allocation unit of a time domain and a frequency domain, in which one or more consecutive subcarriers (subcarriers) may be included. The number of subcarriers contained in the RB may be the same regardless of the parameter set, for example, 12. The number of subcarriers included in the RB may also be determined according to the parameter set.

Further, the time domain of the RB may contain one or more symbols, which may be 1 slot, 1 mini slot, 1 subframe, or 1TTI in length. A 1TTI, a 1 subframe, etc. may each be composed of one or more resource blocks.

In addition, one or more RBs may be referred to as Physical Resource Blocks (PRBs), subcarrier groups (Sub-Carrier groups: SCGs), resource element groups (Resource Element Group: REGs), PRB pairs, RB peering.

Furthermore, a Resource block may be composed of one or more Resource Elements (REs). For example, 1RE may be a radio resource region of 1 subcarrier and 1 symbol.

The Bandwidth Part (BWP: bandwidth Part) (which may also be referred to as partial Bandwidth etc.) represents a subset of the contiguous common RB (common resource blocks) for a certain set of parameters in a certain carrier. Here, the common RB may be determined by an index of the RB with reference to a common reference point of the carrier. PRBs are defined in a certain BWP and are numbered within the BWP.

BWP may include BWP for UL (UL BWP) and BWP for DL (DL BWP). One or more BWP may be set for the UE within the 1 carrier.

At least one of the set BWP may be active, and a case where the UE transmits and receives a predetermined signal/channel outside the active BWP may not be envisaged. In addition, "cell", "carrier", etc. in the present disclosure may be replaced with "BWP".

The above-described structure of the radio frame, subframe, slot, mini-slot, symbol, etc. is merely an example. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of mini-slots included in a slot, the number of symbols and RBs included in a slot or mini-slot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the Cyclic Prefix (CP) length, and the like may be variously changed.

The terms "connected," "coupled," or any variation of these terms are intended to refer to any direct or indirect connection or coupling between two or more elements, including the case where one or more intervening elements may be present between two elements that are "connected" or "coupled" to each other. The combination or connection of the elements may be physical, logical, or a combination of these. For example, "connection" may be replaced with "Access". As used in this disclosure, it is considered that for two elements, the interconnection "or" bonding "is made by using at least one of one or more wires, cables, and printed electrical connections, and as some non-limiting and non-inclusive examples, by using electromagnetic energy or the like having wavelengths in the wireless frequency domain, the microwave region, and the optical (including both visible and invisible) region.

The reference signal may be simply RS (Reference Signal) or may be called Pilot (Pilot) depending on the standard applied.

As used in this disclosure, the recitation of "according to" is not intended to mean "according to" unless explicitly recited otherwise. In other words, the term "according to" means "according to only" and "according to at least" both.

The "unit" in the structure of each device described above may be replaced with "part", "circuit", "device", or the like.

Any reference to elements using references such as "first," "second," etc. used in this disclosure, is not intended to limit the number or order of such elements in its entirety. These designations are used in this disclosure as a convenient way of distinguishing between two or more elements. Thus, references to first and second elements do not indicate that only two elements can be taken herein or that in any aspect the first element must precede the second element.

Where the terms "include", "comprising" and variations thereof are used in this disclosure, these terms are intended to be inclusive in the same sense as the term "comprising". Also, the term "or" as used in this disclosure means not exclusive or.

In the present disclosure, for example, where an article is added by translation as in a, an, and the in english, the present disclosure also includes a case where a noun following the article is in plural.

The terms "determining" and "determining" used in the present disclosure may include various operations. The "judgment" and "decision" may include, for example, a matter in which judgment (determination), calculation (calculation), calculation (processing), derivation (development), investigation (investigation), search (registration up) (for example, search in a table, database, or other data structure), confirmation (evaluation), or the like are regarded as a matter in which "judgment" and "decision" are performed. Further, "determining" or "deciding" may include a matter that a reception (e.g., reception of information), transmission (e.g., transmission of information), input (input), output (output), access (e.g., access of data in a memory) is performed as "determining" or "deciding" or the like. Further, "judging" and "deciding" may include matters of solving (resolving), selecting (selecting), selecting (setting), establishing (establishing), comparing (comparing), and the like as matters of "judging" and "deciding". That is, the terms "determine" and "determining" may include terms that "determine" and "determine" any action. The "judgment (decision)" may be replaced by "assumption", "expectation", "consider", or the like.

In the present disclosure, the term "a and B are different" may also mean that "a and B are different from each other". The term "a and B are different from C" may also be used. The terms "separate," coupled, "and the like are also to be construed as" different.

The present disclosure has been described in detail above, but it should be clear to those skilled in the art that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure can be implemented as modifications and variations without departing from the spirit and scope of the present disclosure as defined by the claims. Accordingly, the description of the present disclosure is intended to be illustrative, and not in any limiting sense.

Description of the reference numerals:

10. wireless communication system

20 PLMN

30. Network node

40 NPN

100A、100B gNB

110. Radio transmitter

120. Radio receiver

130. Connection processing unit

140. Access restriction part

200A、200B UE

210. Radio transmitter

220. Radio receiver

230. Access control unit

240. Connection message transmitting unit

250. Access category holding unit

1001. Processor and method for controlling the same

1002. Memory

1003. Memory device

1004. Communication device

1005. Input device

1006. Output device

1007. Bus line

Claims

1. A terminal, wherein the terminal has:

a control unit that controls access to a network including a public mobile communication network and a non-public mobile communication network; and

A transmitting unit that transmits a message including a connection establishment cause indicating that an access type to the public mobile communication network is a high-reliability or low-delay communication as compared with other access types, to the public mobile communication network in a case of migration from the non-public mobile communication network to the public mobile communication network,

the control section restricts access to the public mobile communication network according to an access restriction for the access type of the high-reliability or low-delay communication received from the public mobile communication network.

2. The terminal of claim 1, wherein,

the terminal has a holding section that holds the access type associated with the high reliability or low delay communication,

the control section controls access to the network according to the access type held by the holding section.