CN114375587B - terminal - Google Patents

Abstract

The UE (200A) controls access to the network. The UE (200A) sends a message including a connection establishment reason to the network, wherein the connection establishment reason indicates that the access type to the network is high reliability or low delay communication compared to other access types.

Description

terminal

Technical Field

The present invention relates to a terminal for performing access control to a network.

Background technique

In the 3rd Generation Partnership Project (3GPP), Long Term Evolution (LTE) is standardized, LTE-Advanced (hereinafter referred to as LTE including LTE-Advanced) is standardized for the purpose of further speeding up LTE, and the standardization of the fifth generation mobile communication system (5th generation mobile communication system) (also called 5G, New Radio (NR) or (Next Generation (NG)) is also promoted.

NR specifies technologies for providing Ultra-Reliable and Low-Latency Communications (URLLC).

In order to provide such URLLC more reliably, a technology of utilizing a dedicated mobile communication network called a non-public network (NPN: Non-Public Network) instead of utilizing a public mobile communication network (PLMN: Public Land Mobile Network) has been studied (Non-Patent Document 1).

In addition, NR also specifies the technology that allows NPN-oriented terminals (User Equipment, UE, hereinafter also referred to as NPN-UE) to access the services of PLMN via NPN or autonomously access the services of PLMN (Non-Patent Document 2).

Prior art literature

Patent Literature

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

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 the 5G system; Stage 1 (Release 16), 3GPP, June 2019

Summary of the invention

However, the above-mentioned access to the service of the PLMN by the NPN-UE has the following problems: Specifically, when the NPN-UE cannot connect to the NPN due to a failure of the NPN, the NPN-UE may request connection to the PLMN.

As mentioned above, when NPN-UE may be used to provide URLLC and the requested quality of service (QoS) is high, especially when multiple NPN-UEs access the PLMN (connection request) at the same time, wireless resources will be tight, and there is concern that it will adversely affect the communication of UE facing the PLMN (hereinafter also referred to as PLMN-UE).

The present invention is completed in view of the above situation, and its purpose is to provide a terminal that can suppress the adverse impact on the communication of other terminals such as PLMN-UE even when NPN-UE provides URLLC and accesses PLMN.

One embodiment of the present disclosure provides a terminal (UE 200A), which includes: a control unit (access control unit 230) that controls access to a network; and a sending unit (connection message sending unit 240) that sends a message containing a connection establishment reason to the network, wherein the connection establishment reason indicates that the access type to the network is high reliability or low latency communication compared to other access types.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a diagram schematically showing the overall configuration of a wireless communication system 10 .

FIG2 is a functional block diagram of UE 200A.

Figure 3 is a functional block diagram of gNB100A.

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

FIG5 is a diagram showing a structural example of RRCSetupRequest.

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

Figure 7 is a diagram showing an example of the hardware structure of gNB100A, gNB100B, UE 200A and UE 200B.

Detailed ways

Hereinafter, the embodiments will be described based on the drawings. In addition, the same or similar reference numerals are given to the same functions and structures, and their descriptions are appropriately omitted.

(1) Overall structure of wireless communication system

Fig. 1 is a diagram showing the overall schematic configuration of a wireless communication system 10 according to the present embodiment. The wireless communication system 10 is a wireless communication system based on 5G New Radio (NR).

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 (hereinafter referred to as PLMN 20) and a non-public network 40 (hereinafter referred to as NPN 40).

The PLMN 20 may also be referred to as a public mobile communication network, a mobile communication network, a public terrestrial mobile network, etc. The PLMN 20 includes a network node 30 and a wireless base station 100A (hereinafter referred to as gNB100A). In addition, the PLMN 20 may also be interpreted as an operator (communication operator) that provides services using the PLMN 20.

The network node 30 is a network device constituting the PLMN 20. Specifically, the network node 30 can be interpreted as a communication node that implements functions such as an access and mobility management function (AMF: Access and Mobility Management Function) and a session management function (SMF: Session Management Function).

gNB100A is a wireless base station based on 5G (NR), and performs wireless communication based on 5G with user equipment 200A (User Equipment 200A, hereinafter referred to as UE 200A) and user equipment 200B (User Equipment 200B, hereinafter referred to as UE 200B). gNB100A is also a network device constituting PLMN 20, and gNB100A can implement part of the functions of AMF or SMF to replace AMF or SMF.

NPN 40 can also be called a non-public mobile communication network, or a non-public network, a private network, etc. NPN40 includes a wireless base station 100B (hereinafter referred to as gNB100B).

NPN 40 can be deployed in various structures using both virtual and physical elements for the purpose of being used by a private entity such as an enterprise. Specifically, it can be deployed as a completely independent network (Stand-alone Non-Public Network (SNPN)), or it can be hosted by PLMN 20, or it can be provided as a slice of PLMN 20. In addition, NPN can also be called a closed access group (CAG: Closed Access Group).

That is, the wireless communication system 10 (5G system) can support non-public networks (NPN) and support NPNs that provide coverage within a specific geographic area. The 5G system can support both physical and virtual NPNs, and can also support independent operation of NPNs. On the other hand, the 5G system can provide access to subscribed PLMN services via NPNs, or access to selected NPN services via PLMNs.

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

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

gNB100A forms cell C10. gNB100B forms cell C20. UE 200B (PLMN-UE) for PLMN resides in cell C10 and can connect to gNB100A. As described above, UE 200A (NPN-UE) for NPN can access the subscribed PLMN service via NPN.

In addition, UE 200A resides in cell C20 and is able to connect to gNB 100B. In addition, UE 200B is also able to access the NPN service if access to the selected NPN service via the PLMN is provided.

UE 200B for PLMN can be understood as a terminal having a contract with an operator providing services using PLMN 20. In addition, UE 200A for NPN may not necessarily be a terminal having a contract with an operator providing services using NPN 40, but can also be understood as a terminal allowed to use services using 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. In addition, the gNB and the UE can support Massive MIMO that generates a beam with higher directivity by controlling wireless signals transmitted from multiple antenna elements, carrier aggregation (CA) that bundles and uses multiple component carriers (CCs), and dual connectivity (DC) that simultaneously communicates between the UE and two NG-RAN nodes.

(2) Functional block structure of wireless communication system

Next, the functional block structure of the wireless communication system 10 is described. Specifically, the functional block structure of UE 200A and gNB100A is described.

(2.1)UE 200A

2 is a functional block diagram of UE 200A. As shown in FIG2 , UE 200A includes a radio transmission unit 210 , a radio reception unit 220 , an access control unit 230 , a connection message transmission unit 240 , and an access category storage unit 250 .

The wireless transmission unit 210 transmits a wireless signal in accordance with the 5G standard. In addition, the wireless reception unit 220 receives a wireless signal in accordance with the 5G standard.

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 the 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 the unified access control (UAC) specified in 3GPP TS 24.501 and the like.

In order to determine the access type (also called access category) that can be applied to the access attempt of UE 200A, the access control unit 230 checks the rules of the table (Mapping table for access categories) maintained by the access category maintenance unit 250 (refer to TS 24.501 Table 4.5.2.2), and uses the access category that is consistent with the barring check.

That is, the access control unit 230 controls access to the network based on the access type (access category) held by the access category holding unit 250 .

The access control unit 230 performs access control on access attempts defined by the following event list.

UE 200A is in 5G MM-IDLE mode in 3GPP access and an event occurs that requires transition to 5G MM-CONNECTED mode

UE 200A is in 5G MM-CONNECTED mode accessed via 3GPP, or in 5G MM-CONNECTED mode with an indication of inactivation of the radio resource control layer (RRC), and any of the predetermined events occurs

In addition, operations related to access control of UE 200A will be further described later.

The connection message sending unit 240 sends a message requesting connection to the network. Specifically, the connection message sending unit 240 sends a message including a connection establishment cause to the network. In the present embodiment, the connection message sending unit 240 constitutes a sending unit.

The connection message sending unit 240 can send a message including mo (mobile originating)-Data, mo-VoiceCall, mo-VideoCall, mo-SMS (Short Message Service), mps (multimedia priority service)-PriorityAccess, and mcs (mission critical service)-PriorityAccess as a reason for establishing the connection.

In this embodiment, the connection message sending unit 240 can also send a message containing high reliability and low latency communication (URLLC) as a connection establishment reason. That is, the connection message sending unit 240 can send a message containing the following connection establishment reason to the network, and the connection establishment reason indicates that the access type (access category) to the network is high reliability or low latency communication compared with other access types.

In addition, the name of the URLLC used as the reason for establishing the connection (essentially the access type (access category)) does not have to be URLLC, as long as it is a name indicating high reliability or low latency communication, for example, it may be URLLC service (URLLC service (low latency service)), industrial IoT (IIOT) service, high security and/or high reliability service (high security, high reliability service), high QoS service (high QoS service), etc. In other words, any name may be used as long as it is a name indicating high demanding under various service levels such as speed (latency), wireless quality, and error resistance.

The connection message sending unit 240 is capable of sending an RRC message including the reason for establishing the connection. Specifically, the connection message sending unit 240 is capable of sending an RRCSetupRequest including an establishment cause such as URLLC. In addition, the connection message sending unit 240 can also use other RRC messages (e.g., RRCReconfiguration), and messages of other layers can be used as long as it can indicate that the access type is URLLC.

In addition, the timing of sending the message (specifically, the connection establishment reason) is not particularly limited, and can be any timing from the start to the completion of the connection process with the network, or after the connection with the network is completed. In particular, in this embodiment, when UE 200A migrates from NPN 40 to PLMN 20, the connection message sending unit 240 can send a message including the connection establishment reason to PLMN 20.

The access category storage unit 250 stores information related to the access category. As described above, the access category may be referred to as an access type or the like.

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

This table includes URLLC as a new access category. In the present embodiment, the access category holding unit 250 is a holding unit for holding access types (access categories) associated with high reliability or low delay communication.

(2.2)gNB100A

FIG3 is a functional block diagram of gNB100A. As shown in FIG3, gNB100A has a wireless transmission unit 110, a wireless reception unit 120, a connection processing unit 130, and an access restriction unit 140.

The wireless transmission unit 110 transmits a wireless signal in accordance with the 5G standard. Also, the wireless reception unit 120 receives a wireless signal in accordance with the 5G standard.

The connection processing unit 130 performs processing related to the connection with the UE 200A (and the UE 200B, the same below). Specifically, the connection processing unit 130 performs processing related to the connection (RRC connection) in the RRC layer.

In addition, the connection processing unit 130 sets up radio bearers (signaling radio bearer (SRB), data radio bearer (DRB)) via the channel set up with the UE 200A. In addition, the connection processing unit 130 performs transmission and reception of protocol data units (PDU) and service data units (SDU), specifically, performs assembly/disassembly of PDU/SDU in multiple layers (media access control layer (MAC), radio link control layer (RLC), and packet data convergence protocol layer (PDCP), etc.).

In addition, channels include control channels and data channels. Control channels include PDCCH (Physical Downlink Control Channel), PUCCH (Physical Uplink Control Channel), PRACH (Physical Random Access Channel), and PBCH (Physical Broadcast Channel).

In addition, data channels include PDSCH (Physical Downlink Shared Channel), PUSCH (Physical Uplink Shared Channel), and the like.

In addition, 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). Signals include control signals and reference signals of channels, RRC layers, etc. In addition, data refers to data sent via a data channel.

The access restriction unit 140 restricts the access of the UE 200A to the network. Specifically, the access restriction unit 140 performs access restriction based on the UAC defined in 3GPP TS24.501 and the like.

More specifically, the access restriction unit 140 acquires the 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 obtain the access category to which the access restriction is applied from the network node 30, or may determine the access category to which the access restriction is applied based on the load condition of the gNB 100A, etc. In addition, the access categories to which the access restriction is applied may be one or more.

The access restriction unit 140 broadcasts the acquired access category in the cell C20. Specifically, the access restriction unit 140 broadcasts the acquired access category in the cell C20 using system information (ie, system information block (SIB)).

The type of SIB used for this broadcast is not particularly limited, and typically, uac-BarringInfo included in SIB1 can be used.

(3) Operation of wireless communication system

Next, a description will be given of the operation of the wireless communication system 10. Specifically, a description will be given of the application of access restrictions in the network and the operation related to access control of the terminal based on the access restrictions.

(3.1) General Action

First, the operation targeted in this embodiment is briefly described. When NPN-UE (UE 200A) cannot connect to NPN 40 due to a failure of NPN 40, if multiple NPN-UEs simultaneously access the PLMN (connection request), this may adversely affect PLMN-UE (UE 200B).

In particular, NPN-UE may be used to provide URLLC and the requested quality of service (QoS) is high, and the required wireless resources tend to increase. Therefore, if the access of NPN-UE is allowed without restriction, it may be difficult for PLMN-UE to start the random access process using RACH.

More specifically, when the NPN-UE has a contract (normal contract) that allows it to access the PLMN 20, the NPN-UE can establish an RRC connection with the PLMN 20. When a plurality of NPN-UEs used to provide URLLC request a higher quality of service (QoS) at the same time, in order to suppress the adverse effects such as those described above, it is preferable to apply access restrictions based on UAC.

Therefore, this embodiment follows the mechanism of UAC and effectively restricts the access of NPN-UE used to provide URLLC to the network (PLMN 20), thereby suppressing the adverse effects on PLMN-UE.

Specifically, a new access category (high reliability and low latency communication) is defined, and the access request of the UE is controlled according to the UAC.

The new access category (high reliability and low latency communication) is positioned as a category that "needs to support very low latency and very high availability of communication services". This means very high reliability. The overall service latency depends on the latency of the wireless interface, transmission within the 5G system, transmission to servers outside the 5G system, and data processing.

Examples of such scenarios that require support for very low latency and very high availability of communication services include motion control, discrete automation, process automation, power distribution automation, intelligent transportation systems, remote control, railway communications, and AR (Augmented Reality)/VR (Virtual Reality).

(3.2) Detailed actions

FIG. 4 shows an example of a communication sequence 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 RRCSetupRequest to the network (here, it is assumed that the network is migrating (cell reselection) from NPN 40 to PLMN 20) (S10).

RRCSetupRequest includes the establishment cause of the RRC connection.

Fig. 5 shows an example of the structure of RRCSetupRequest. As shown in Fig. 5, RRCSetupRequest includes establishment cause. In particular, in this embodiment, URLLCservice (see the underlined part) indicating high reliability and low delay communication is defined.

UE 200A sends RRCSetupRequest with URLLC service configured as the reason for connection establishment.

The network (PLMN 20) performs the RRC connection establishment process according to the received RRCSetupRequest, and establishes an RRC connection with UE 200A (S20-S40). In addition, settings of SRB and DRB (not shown in FIG. 4) are performed, and UE 200A starts communication via the network.

The network (PLMN 20) can initiate access restriction based on the congestion status of the network, etc. Here, the network takes URLLCservice as an object and initiates access restriction.

The network (PLMN 20) sets URLLC service for uac-AccessCategory of uac-BarringInfo included in SIB1, and this SIB1 including uac-BarringInfo is transmitted to UE 200A (S50).

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

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

Fig. 6 shows a structural example of a mapping table used in access control in UE 200A. Specifically, Fig. 6 is a structural example of a Mapping table for access categories specified in 3GPP TS 24.501 Table 4.5.2.2.

As shown in FIG. 6 , the mapping table includes URLLC as an access category.

As described above, when UE 200A needs to access the 5G system, it initially performs an access control check to determine whether access is allowed. In order to determine the access category that can be applied to the access attempt, UE 200A checks the rules of the mapping table and uses the access category that is consistent with the barring check.

In addition, in the case where the access attempt is consistent with multiple rules, the access category with the smallest rule number is selected. In addition, in the case where the access attempt is consistent with multiple operator-defined access category definitions, the UE can select the access category from the operator-defined access category definition with the lowest priority value.

(4) Action and Effect

According to the above-mentioned implementation, the following effects can be obtained. Specifically, UE 200A (UE 200B as well) can send a message (RRCSetupRequest) containing a connection establishment cause (establishment cause) to the network (PLMN 20), and the connection establishment cause (establishment cause) indicates that the access type (access category) to the network (PLMN20) is high reliability or low delay communication (URLLC) compared with other access types.

Therefore, the network (specifically, gNB100A) can recognize that UE 200A (NPN-UE) accesses PLMN 20 to provide URLLC. As a result, the network can effectively limit URLLC services that have a high requested quality of service (QoS) and a strong tendency to increase required wireless resources as needed.

That is, according to UE 200A (and gNB100A), even when NPN-UE etc. provides URLLC and accesses PLMN, it is possible to suppress the adverse effects on the communication of other terminals such as PLMN-UE.

In this embodiment, UE 200A can control access to the network according to the access type maintained (specifically, the mapping table shown in FIG6 ). As described above, the mapping table includes URLLC, so UE 200A can implement reliable access control with URLLC as the object. Thus, the adverse effects on the communication of other terminals such as PLMN-UE can be reliably suppressed.

In this embodiment, as described above, in particular, access restriction and access control are performed for NPN-UE providing URLLC. Therefore, even in the case where NPN-UE migrates to PLMN 20, etc., access accompanied by URLLC performed by NPN-UE can be reliably restricted. As a result, adverse effects on communications of other terminals such as PLMN-UE can be more reliably suppressed.

(5) Other Implementation Methods

As mentioned above, although the content of this invention was demonstrated based on an Example, this invention is not limited to these descriptions, Various deformation|transformation and improvement are possible, and it is obvious to a person skilled in the art.

For example, in the above-mentioned embodiment, access restriction and access control are described for UE 200A of NPN 40 (non-public mobile communication network) providing URLLC, but as long as it is a terminal that provides URLLC, that is, high-reliability and low-latency communication, it does not necessarily have to be NPN-UE, and access restriction and access control can also be performed on PLMN-UE.

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

The block diagrams (Figs. 2 and 3) used in the description of the above-mentioned embodiments show blocks in units of functions. These functional blocks (structural parts) are implemented by any combination of at least one of hardware and software. In addition, there is no particular limitation on the implementation method of each functional block. That is, each functional block can be implemented using a device that is physically or logically combined, or two or more devices that are physically or logically separated can be directly or indirectly connected (for example, using wired, wireless, etc.) and implemented using these multiple devices. The functional block can also be implemented by combining software with the above-mentioned device or the above-mentioned multiple devices.

Functionally, it includes judging, deciding, determining, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, solving, selecting, selecting, establishing, comparing, assuming, expecting, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but is not limited to these. For example, the functional block (structural part) that enables the transmission function is called a transmitting unit or a transmitter. In short, as mentioned above, there is no particular limitation on the implementation method.

In addition, the above-mentioned gNB100A, gNB100B, UE 200A and UE 200B (the device) can also function as a computer that performs the processing of the wireless communication method of the present disclosure. Figure 7 is a diagram showing an example of the hardware structure of the device. As shown in Figure 7, the device can also 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 and a bus 1007.

In the following description, the word "device" may be replaced by "circuit", "device", "unit", etc. The hardware structure of the device may include one or more of the devices shown in the figure, or may exclude some of the devices.

Each functional block of the device (see FIGS. 2 and 3 ) is implemented by any hardware element of the computer device or a combination of the hardware elements.

In addition, each function in the device is implemented by the following method: predetermined software (program) is read into hardware such as processor 1001 and memory 1002, so that processor 1001 performs calculations and controls the communication of communication device 1004 or controls at least one of the reading and writing of data in memory 1002 and storage 1003.

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

In addition, the processor 1001 reads a program (program code), a software module or data, etc. from at least one of the memory 1003 and the communication device 1004 to the memory 1002, and performs various processes accordingly. As a program, a program that causes a computer to perform at least a part of the actions described in the above-mentioned embodiments is used. In addition, with respect to the above-mentioned various processes, although it is described that the above-mentioned various processes are performed by one processor 1001, the above-mentioned various processes can also be performed simultaneously or sequentially by more than two processors 1001. The processor 1001 can also be installed by more than one chip. In addition, the program can also be sent from the network via a telecommunication line.

The memory 1002 is a computer-readable recording medium, and may be composed of at least one of a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a random access memory (RAM), etc. The memory 1002 may also be referred to as a register, a cache, a main memory (main storage device), etc. The memory 1002 may store a program (program code), a software module, etc. that can execute a method according to an embodiment of the present disclosure.

The memory 1003 is a computer-readable recording medium, and may be composed 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 (e.g., a compressed disk, a digital versatile disk, a Blu-ray (registered trademark) disk, a smart card, a flash memory (e.g., a card, a stick, a key drive), a Floppy (registered trademark) disk, a magnetic strip, etc. The memory 1003 may also be referred to as an auxiliary storage device. The above-mentioned recording medium may be, for example, other appropriate media such as a database, a server, etc. that includes at least one of the memory 1002 and the memory 1003.

The communication device 1004 is hardware (transceiver) used to communicate between computers via at least one of a wired network and a wireless network, and may also be called a network device, a network controller, a network card, a communication module, etc.

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 duplex (FDD) and time division duplex (TDD).

The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.). The output device 1006 is an output device that implements output to the outside (e.g., a display, a speaker, an LED light, etc.). In addition, the input device 1005 and the output device 1006 may also be integrally configured (e.g., a touch panel).

In addition, the processor 1001 and the memory 1002 and other devices are connected via a bus 1007 for communicating information. The bus 1007 may be configured using a single bus or may be configured using different buses for each device.

In addition, the device may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), etc., and a part or all of each functional block may be implemented 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/implementation method described in the present disclosure, and other methods may also be used. For example, the notification of information may be implemented through physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), high-layer signaling (e.g., RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals or a combination thereof. In addition, RRC signaling may also be referred to as an RRC message, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc.

Each form/embodiment described in the present disclosure may also be applied to at least one of LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), Future Radio Access (FRA), New Radio (NR), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), a system using other appropriate systems, and a next-generation system extended therefrom. In addition, a combination of a plurality of systems (for example, a combination of at least one of LTE and LTE-A with 5G, etc.) may also be applied.

The processing procedures, timings, processes, etc. of each form/implementation described in this disclosure may be changed in order without contradiction. For example, for the method described in this disclosure, the elements of various steps are presented in an illustrative order, but are not limited to the specific order presented.

In the present disclosure, specific actions performed by a base station are sometimes performed by its upper node depending on the situation. In a network consisting of one or more network nodes having a base station, various actions performed to communicate with a terminal can be performed by at least one of the base station and other network nodes other than the base station (for example, consider MME or S-GW, etc., but not limited to these). In the above, the case where there is one other network node other than the base station is illustrated, but the other network node may also be a combination of multiple 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), and can also be input or output via multiple network nodes.

The input or output information can be stored in a specific location (e.g., memory) or managed using a management table. The input or output information can be rewritten, updated, or appended. The output information can also be deleted. The input information can also be sent to other devices.

The determination may be made by a value represented by 1 bit (0 or 1), by a Boolean value (Boolean: true or false), or by comparison of numerical values (for example, comparison with a predetermined value).

Each form/implementation described in the present disclosure may be used alone or in combination, and may be switched depending on the execution. In addition, notification of scheduled information is not limited to being performed explicitly (e.g., notification of "yes X"), but may also be performed implicitly (e.g., notification of the scheduled information is not performed).

Software, whether referred to as software, firmware, middleware, microcode, hardware description language, or by other names, shall be interpreted broadly to refer to commands, sets of commands, codes, code segments, program codes, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc.

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

The information, signals, etc. described in the present disclosure may also be represented by any of a variety of different technologies. For example, the data, commands, instructions, information, signals, bits, symbols, chips, etc. that may be involved in the above description as a whole may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination of these.

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

As used in this disclosure, the terms "system" and "network" may be used interchangeably.

In addition, the information, parameters, etc. described in the present disclosure may be represented by absolute values, relative values to predetermined values, or other corresponding information. For example, wireless resources may also be indicated by indexes.

The names used for the above parameters are not limiting in any way. Furthermore, the formulas etc. using these parameters may sometimes differ from those explicitly disclosed in this disclosure. Various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by appropriate names, and therefore the various names assigned to these various channels and information elements are not limiting in any way.

In the present disclosure, the terms "base station (BS)," "wireless base station", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", "access point", "transmission point", "reception point", "transmission/reception point", "cell", "sector", "cell group", "carrier", "component carrier" and the like are used interchangeably. Base stations are sometimes referred to as macrocells, small cells, femtocells, picocells, etc.

A base station can accommodate one or more (for example, 3) cells (also called sectors). When a base station accommodates multiple cells, the overall coverage area of the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services through a base station subsystem (for example, a small base station for indoor use (RRH: Remote Radio Head)).

The terms "cell" or "sector" refer to a part or the entirety of a coverage area of at least one of a base station and a base station subsystem that provide communication services within the coverage area.

In the present disclosure, terms such as “mobile station (MS)”, “user terminal (user terminal)”, “user equipment (UE)”, and “terminal” may be used interchangeably.

For mobile stations, those skilled in the art sometimes also use the following terms: subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other appropriate terms.

At least one of the base station and the mobile station may also be referred to as a transmitting device, a receiving device, a communication device, etc. In addition, at least one of the base station and the mobile station may be a device mounted on a mobile body, the mobile body itself, etc. The mobile body may be a means of transportation (e.g., a car, an airplane, etc.), a mobile body that moves in an unmanned manner (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). In addition, at least one of the base station and the mobile station also includes a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

In addition, the base station in the present disclosure may also be replaced by a mobile station (user terminal, the same below). For example, regarding a structure in which the communication between a base station and a mobile station is replaced by communication between multiple mobile stations (for example, it may also be referred to as D2D (Device-to-Device), V2X (Vehicle-to-Everything, etc.), the various forms/implementations of the present disclosure may also be applied. In this case, it may also be a structure in which the mobile station has the functions of the base station. In addition, terms such as "uplink" and "downlink" may also be replaced by terms corresponding to communication between terminals (for example, "side"). For example, an uplink channel, a downlink channel, etc. may also be replaced by a side channel.

Likewise, the mobile station in the present disclosure may be replaced by a base station. In this case, the base station may have the same functions as the mobile station.

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

A subframe may also be composed of one or more time slots in the time domain. A subframe may be a fixed time length (eg, 1 ms) that is independent of numerology.

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

A slot may be composed of one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.) in the time domain. A slot may be a time unit based on a parameter set.

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

A radio frame, a subframe, a time slot, a mini-time slot, and a symbol all represent time units for transmitting signals. A radio frame, a subframe, a time slot, a mini-time slot, and a symbol may be referred to by other corresponding names.

For example, 1 subframe can be called a transmission time interval (TTI), multiple consecutive subframes can also be called a TTI, and 1 time slot or 1 mini time slot can also be called a TTI. That is, at least one of the subframe and the TTI can be a subframe (1ms) in the existing LTE, or a period shorter than 1ms (for example, 1-13 code elements), or a period longer than 1ms. In addition, the unit representing TTI can be a time slot, a mini time slot, etc. instead of a subframe.

Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in the LTE system, the base station schedules the allocation of wireless resources (frequency bandwidth, transmission power, etc. that can be used in each user terminal) to each user terminal in units of TTI. In addition, the definition of TTI is not limited to this.

TTI can be a transmission time unit for data packets (transport blocks), code blocks, code words, etc. after channel coding, or a processing unit for scheduling, link adaptation, etc. In addition, when TTI is assigned, the time interval (e.g., the number of symbols) to which the transport block, code block, code word, etc. is actually mapped can be shorter than the TTI.

In addition, when 1 time slot or 1 mini time slot is called TTI, more than one TTI (i.e., more than one time slot or more than one mini time slot) can constitute the minimum time unit of scheduling. In addition, the number of time slots (mini time slots) constituting the minimum time unit of scheduling can be controlled.

A TTI having a time length of 1 ms is also called a normal TTI (TTI in LTE Rel.8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a time slot, etc. A TTI shorter than a normal TTI may be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a mini-time slot, a sub-time slot, a time slot, etc.

In addition, for a long TTI (for example, a normal TTI, a subframe, etc.), it can be replaced with a TTI having a time length exceeding 1ms, and for a short TTI (for example, a shortened TTI, etc.), it can be replaced with a TTI length that is smaller than the long TTI (longTTI) and has a TTI length of more than 1ms.

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

In addition, the time domain of an RB may include one or more symbols, and may be the length of 1 slot, 1 mini slot, 1 subframe, or 1 TTI. 1 TTI, 1 subframe, etc. may be composed of one or more resource blocks, respectively.

In addition, one or more RBs may be referred to as a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, and the like.

In addition, a resource block may be composed of one or more resource elements (RE). For example, 1 RE may be a radio resource region of 1 subcarrier and 1 symbol.

Bandwidth Part (BWP) (also called partial bandwidth, etc.) represents a subset of contiguous common RBs (common resource blocks) for a parameter set in a certain carrier. Here, the common RB can be determined by the index of the RB based on the common reference point of the carrier. PRBs are defined in a certain BWP and numbered within the BWP.

The BWP may include a BWP for UL (UL BWP) and a BWP for DL (DL BWP). One or more BWPs may be configured for a UE within one carrier.

At least one of the set BWPs may be active, and it is not assumed that the UE transmits or receives a predetermined signal/channel outside the activated BWP. In addition, "cell", "carrier" and the like in the present disclosure may be replaced with "BWP".

The above structures of radio frames, subframes, time slots, mini-time slots, and symbols are only examples. For example, the number of subframes included in a radio frame, the number of time slots per subframe or radio frame, the number of mini-time slots included in a time slot, the number of symbols and RBs included in a time slot or mini-time slot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP: Cyclic Prefix) length, and the like can be changed in various ways.

The terms "connected", "coupled" or all variations of these terms are intended to indicate any direct or indirect connection or combination between two or more elements, and may include the situation where there is one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The combination or connection between elements may be a physical combination or connection, a logical combination or connection, or a combination of these. For example, "access" may be used to replace "connection". In the context of the present disclosure, for two elements, it may be considered that they are "connected" or "coupled" to each other 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 having wavelengths in the wireless frequency domain, microwave region, and light (including both visible and invisible) region, etc.

The reference signal may be referred to as RS (Reference Signal) for short, or may be referred to as a pilot signal according to the applied standard.

The phrase "according to" used in the present disclosure does not mean "only according to" unless otherwise expressly stated. In other words, the phrase "according to" means both "only according to" and "at least according to".

The "unit" in the configuration of each of the above-mentioned devices can be replaced with a "section", "circuit", "device" or the like.

Any reference to an element using the terms "first", "second", etc. used in this disclosure does not necessarily limit the number and order of these elements. These terms are used in this disclosure as a simple method to distinguish between two or more elements. Therefore, a reference to a first and a second element does not mean that only two elements can be used here or that the first element must precede the second element in any form.

When the terms “include,” “including,” and variations thereof are used in the present disclosure, these terms are intended to be inclusive, as is the term “comprising.” Furthermore, the term “or” used in the present disclosure does not mean an exclusive or.

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

The terms "determining" and "determining" used in the present disclosure sometimes also include various actions. "Determining" and "determining" may include, for example, considering matters that have been judged, calculated, calculated, processed, derived, investigated, searched (for example, searched in a table, database or other data structure), confirmed (ascertaining) as matters that have been "judged" or "determined", etc. In addition, "determining" and "determining" may include considering matters that have been received (for example, receiving information), transmitted (for example, transmitting information), input, output, accessed (for example, accessed data in memory) as matters that have been "judged" or "determined", etc. In addition, "determining" and "determining" may include considering matters that have been resolved (resolving), selected (selecting), chosen (choosing), established (establishing), compared (comparing), etc. as matters that have been "judged" or "determined". That is, "determining" and "determining" may include matters that have been "judged" or "determined" by any action. In addition, the word “determine” can also be replaced by “assuming”, “expecting”, “considering”, etc.

In the present disclosure, the term "A and B are different" may also mean "A and B are different from each other". In addition, the term may also mean "A and B are different from C, respectively". The terms "separate" and "combined" are also interpreted in the same way as "different".

The present disclosure is 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 a modification and variation without departing from the subject matter and scope of the present disclosure as determined by the claims. Therefore, the purpose of the description of the present disclosure is to illustrate and not to have any limiting meaning on the present disclosure.

Description of labels:

10 Wireless Communication Systems

20 PLMN

30 network nodes

40 NPN

100A, 100B gNB

110 Wireless Transmission Unit

120 Wireless receiving unit

130 Connection processing unit

140 Access Restriction Department

200A, 200B UE

210 Wireless Transmission Unit

220 Wireless receiving unit

230 Access Control Department

240 Connection message sending unit

250 Access category holding unit

1001 Processor

1002 Memory

1003 Memory

1004 Communication Device

1005 Input Device

1006 Output Device

1007 Bus

Claims (2)

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.