CN114631340B - Terminal - Google Patents

Abstract

The UE (200) receives from the network (20) association information of access restrictions supported by the network, and determines access attributes to be used when accessing the network based on the received association information. The UE (200) performs access to the network with access based on the determined access attribute.

Description

Terminal

Technical Field

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

Background

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

In such a 5G standard, unified access control (Unified Access Control:uac) is defined as a means for restricting access to a network by a terminal (User Equipment) (non-patent document 1 and non-patent document 2).

The access restriction is a method of notifying a terminal of a network congestion or a failure using broadcast information such as a communication request type of a restriction target or a type and a restriction rate set by a terminal of the restriction target, and restricting access from the terminal to the network.

The UAC is obtained by integrating various access restrictions such as LTE access class restrictions (Access Class Barring: ACB) and service specific access control (Service Specific Access Control: SSAC) into one. In the UAC, restriction can be performed per access category (access category).

In addition, in Release-16 of 3GPP, it is studied to assign IP multimedia subsystem (IP Multimedia Subsystem: IMS) registration-related signaling (registration-related signalling) (control signal for Voice over LTE (VoLTE)) to category9 (category 9), which is one of Access Categories (ACs) already reserved for future expansion (non-patent document 3).

Prior art literature

Non-patent literature

Non-patent document 1:3GPP TS 22.261V15.8.0,3rd Generation Partnership Project; technical Specification Group Services and System Aspects; service requirements for the 5G system; stage 1 (Release 15), 3GPP, 9 months 2019

Non-patent document 2:3GPP TS 24.501V15.5.0,3rd Generation Partnership Project; technical Specification Group Core Network and Terminals; non-Access-Strateum (NAS) protocol for 5G System (5 GS); stage 3 (Release 15), 3GPP, 9 months 2019

Non-patent document 3: "Unified Access Control for IMS registration related signaling", C1-196509,3GPP TSG-CT WG1 Meeting #120,3GPP, 10 months 2019

Disclosure of Invention

However, when such an access class already reserved for future expansion as described above is utilized, the following problems arise.

Specifically, in the case where a terminal supporting only Release-16 or its later version (appropriately referred to as a new generation terminal (UE)) accesses to a network supporting only Release-15 or its earlier version (appropriately referred to as an old generation Network (NW)), the new generation terminal can perform access to the old generation network using the already reserved access category.

However, the old generation network cannot identify the access category, so that the new generation terminal cannot be properly restricted in access, which may cause the new generation terminal to break through the access restriction against the intention of the operator.

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 operating appropriately even when a network supporting an old version is accessed using a new access attribute such as an access class for extension.

One aspect of the present disclosure provides a terminal (UE 200) having: a receiving unit (wireless receiving unit 220) that receives, from a network (NG-RAN 20), association information of access restrictions supported by the network; and a control unit (access control unit 260) that decides an access attribute to be used when accessing to the network based on the association information, the control unit performing access to the network based on the decided access attribute.

Drawings

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

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

Fig. 3 is a diagram showing a configuration example of a protocol stack of the UE 200 related to access control to the network.

Fig. 4 is an explanatory diagram of a problem related to access restriction in the case where new and old versions exist in a mixed manner.

Fig. 5 is a diagram illustrating an example of operations related to access restriction in the wireless communication system 10.

Fig. 6 is a diagram showing an access control operation flow of the UE 200 corresponding to the network-based access restriction.

Fig. 7 is a diagram showing a configuration example of a conversion table of access categories and broadcast information from a network.

Fig. 8 is a diagram showing an example of a hardware configuration of the UE 200.

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 radio 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 New air interface (New Radio: NR) of 5G, and includes a Next Generation Radio access network 20 (Next Generation-Radio Access Network, hereinafter referred to as NG-RAN 20), and a terminal 200 (User Equipment 200, hereinafter referred to as UE 200).

The NG-RAN 20 includes a radio base station 100 (hereinafter referred to as a gNB 100). 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.

The NG-RAN 20 actually comprises a plurality of NG-RAN nodes (NG-RAN nodes), in particular a plurality of gnbs (or NG-enbs), connected to a core network (5 GC, not shown) according to 5G. In addition, the NG-RAN 20 and 5GC may also be simply expressed as "networks".

The gNB 100 is a 5G-dependent radio base station, and performs 5G-dependent radio communication with the UE 200. The gNB 100 and the UE 200 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) using a plurality of Component Carriers (CCs), and Dual Connection (DC) that simultaneously communicates between the UE and each of a plurality of NG-RAN nodes.

In this embodiment, the UE 200 supports Release-16 (New version) of 3GPP (which may also be referred to as corresponding to Release-16). On the other hand, NG-RAN 20 including gNB 100 and 5GC (core network) support Release-15 (legacy version) (which may also be referred to as corresponding to Release-15). In the present embodiment, the UE 200 is appropriately referred to as a new generation terminal, and an appropriate network including the NG-RAN 20 and 5GC is referred to as an old generation network.

Furthermore, in the wireless communication system 10, unified Access Control (UAC) is applied as a means of access restriction for the UE 200 to the network. The UAC is obtained by unifying a plurality of restriction controls in LTE. In the UAC, various communication requests in the terminal are mapped to one Access Category (AC), and one or more Access identifiers (Access identities). The radio base station can perform access restriction for each combination.

Tables 1 and 2 show Access Category and Access Identity, respectively, defined in Release-15 of 3GPP (NR).

TABLE 1

TABLE 2

Access identifier	Mobile station set point
		0	The following are other than
1	MPS call
		2	MCS call
3～10	Reservation
		11	AC11
12	AC12
		13	AC13
14	AC14
		15	AC15

An Access Category (Access Category) is an identifier of the communication request Category. Different numbers are given to the terminals according to various communication requests, and areas that can be defined by operators are also defined.

The Access identifier (Access Identity) is an identifier set by the terminal. Terminals set as MPS (Multimedia Priority Service: multimedia priority service) call, MCS (Mission Critical Service: mission critical service) call, and priority call (Access Class 11 to 15) are given different numbers, respectively, and are uniformly set to "0" except that they are set to MPS (Multimedia Priority Service: multimedia priority service) call, MCS (Mission Critical Service: mission critical service) call, and MCS (Access Class 11 to 15) terminals.

In addition, MPS refers to a service that can provide a specific communication to a terminal even when a network is in a congestion state. The MCS is a service that has a significant adverse effect on life or society due to a system failure or a service interruption.

As shown in Table 1, access categories 9 to 31 have been reserved in Release-15 to cope with the case where the Category is newly specified in the future. Likewise, access identities 3-10 have been reserved.

In the present embodiment, a control signal for Voice over LTE (VoLTE) is assigned IP Multimedia Subsystem (IMS) registration-related signalling (for example) to reserved class 9 in Release-16.

Thus, the new Indication is notified from the IMS layer (layer responsible for VoLTE control) to the Non-Access Stratum (NAS), and mapped to the new class 9 in the NAS layer. Further, details of the operation related to the UAC will be described below.

(2) Functional block structure of radio communication system

Next, the functional block configuration of the wireless communication system 10 will be described. Specifically, a description will be given of a functional block configuration of the UE 200 and a configuration example of a protocol stack of the UE 200 related to access control to the network.

(2.1) functional Block Structure

Fig. 2 is a functional block configuration diagram of the UE 200. As shown in fig. 2, the UE 200 includes a radio transmitter 210, a radio receiver 220, a network information acquirer 230, a support determiner 240, a table holder 250, and an access controller 260.

The radio transmission unit 210 transmits an uplink signal (UL signal) according to NR. Further, the radio receiving section 220 receives a downlink signal (DL signal) according to NR.

In particular, in the present embodiment, the wireless receiving unit 220 can receive the association information of the access restriction from the network. In the present embodiment, the wireless receiving unit 220 constitutes a receiving unit.

Specifically, the radio receiving unit 220 receives, via the gNB 100, association information including access restrictions supported by the network of the NG-RAN 20.

Typically, the association information of the access restriction refers to an access category (may be referred to as a communication request category) supported by the network, but may also be a version (may be referred to as version) supported by the network. As described above, the supported access categories may be determined according to the version supported by the network.

The display of the access categories may be a list of numbers, or may be the maximum value of the supported access categories.

The access restriction association information may include a terminal setting type supported by the network.

The network information acquisition unit 230 acquires information related to a network via the wireless reception unit 220. Specifically, the network information acquisition unit 230 can acquire the above-described access restriction related information.

For example, the network information acquisition unit 230 may acquire the association information in a location registration procedure (Registration Accept) of the UE 200 with the network, or may acquire the association information included in general broadcast information (may also be referred to as system information).

The support determination unit 240 determines the support status of various services and functions provided by the network. In particular, in the present embodiment, the support determination unit 240 can determine the access category supported by the network.

Specifically, the support determination unit 240 determines the access category supported by the network based on the association information of the access restriction acquired by the network information acquisition unit 230.

The table holding unit 250 holds a table used for access control corresponding to access restrictions of the network. Specifically, the table holding unit 250 holds a table (conversion table) used when changing (may also be referred to as converting) the access class of the UE 200 to the access class supported by the network. In addition, the following is made with respect to a specific example of the table.

The access control unit 260 controls the functional blocks constituting the UE 200. In particular, in the present embodiment, the access control unit 260 can determine an access attribute to be used when the UE200 accesses the network, based on the association information of the access restriction acquired by the network information acquisition unit 230. In the present embodiment, the access control unit 260 constitutes a control unit.

Here, the Access attribute may be an Access type used when the UE200 accesses the network, or may be a terminal set type (Access Identity). Alternatively, it may be interpreted AS a version used when the UE200 accesses the network, and may be interpreted AS an access category (RRC establishment cause) used in the AS layer.

The access control unit 260 can perform access to the network as access based on the determined access attribute.

For example, when it is determined that the network is an old generation network and the class 9 is not supported, the access control unit 260 changes the access attribute to an arbitrary class supported by the network (for example, class 4 (voice call)), and then performs access to the network.

That is, the access control unit 260 can change the access class of the UE200 to the access class supported by the network based on the association information of the access restriction acquired by the network information acquisition unit 230.

The access control unit 260 may change the access category based on a table (held by the table holding unit 250) indicating the association between the access category of the terminal and the access category supported by the network. However, this table is not necessarily required in the change of the access category. The access control unit 260 may change the access category using a fixed mapping of the access category (for example, mapping from category 9 to category 4).

In addition, with respect to the terminal setting type (Access Identity), the Access control unit 260 may change the terminal setting type used by the UE 200 to a terminal setting type supported by the network according to the association information of the Access restriction.

In this case, the table holding unit 250 may hold a table indicating the association between the terminal setting type used by the terminal and the terminal setting type supported by the network, and the access control unit 260 may change the terminal setting type based on the table.

(2.2) Structure of protocol stack of UE 200 related to Access control

Fig. 3 shows an example of the structure of a protocol stack of the UE 200 related to access control to a network.

The example shown in fig. 3 is an example of VoLTE, and for Access control to a network, the UE 200 performs control of VoLTE using layers of an Access Stratum (AS), NAS, and IP multimedia subsystem (IP Multimedia Subsystem: IMS).

Specifically, the IMS layer detects the signaling of the VoLTE control signal, and starts registration-related signalling (registration-associated signaling) (control signal for Voice over LTE (VoLTE)). In the present embodiment, as described above, the communication request is mapped to class 9 (which may also be referred to as a new generation access class), and the NAS layer maps the communication request to class 9.

The AS layer determines whether or not to apply access restriction based on the category (9) and the call category notified from the NAS layer. In addition, the AS layer informs the NAS of the result of the access restriction.

In addition to the layers shown in fig. 3, the UE 200 has a plurality of layers (physical layer, medium access control layer (MAC), radio link control layer (RLC), packet data convergence protocol layer (PDCP), etc.), and the like.

(3) Operation of a wireless communication system

Next, an operation of the wireless communication system 10 will be described. Specifically, operations related to access restrictions in the new-generation terminal (UE 200) and the old-generation network (NG-RAN 20 and 5 GC) will be described.

(3.1) subject related to Access restriction

Fig. 4 is an explanatory diagram of a problem related to access restriction in the case where new and old versions exist in a mixed manner. As shown in fig. 4, in addition, as described above, in the case where the old generation network restricts only the access category of the old generation to the new generation terminal, the new generation terminal attempts access using the access category of the new generation that is not broadcasted from the network.

Since such a new generation access class cannot be restricted from the old generation network, the new generation terminal can perform access (signaling processing) to the old generation network. This causes access to a new-generation terminal, which is the subject of access restrictions originally performed by the operator, to be different from the intention of the operator, and breaks through network-based access restrictions.

Here, access control by UAC will be further described. The gNB 100 notifies the UE 200 of the Access Identity of the restriction object and the restriction object parameter for each Access Category by using MSI (Minimum System Information: minimum system information).

The UE 200 determines whether or not restriction is required based on the Access Category and the Access Identity each time a communication request is made, and performs restriction operation according to the set parameter value when restriction is required.

In LTE, the object of access restriction control is mainly only terminals in the rrc_idle state, but in NR, more detailed access restriction can be realized by restricting all terminals in the RRC state.

The determination method of such access control is described in 3GPP TS38.331 section 5.3.14.5. The UE 200 generates a random number (rand) internally, is not limited if the rand is less than uac-barrenfactor (included in broadcast information), and is limited if the rand is greater than uac-barrenfactor. The UE 200 calculates such a parameter as Tbarring according to the following calculation formula.

"Tbarring"＝(0.7+0.6*rand)*uac-BarringTime

In addition, the UE 200 performs restriction when there is an establishment request of RRC Connection during Tbarring initiation.

(3.2) working example

Next, an operation example for solving the above-described problem related to access restriction will be described. The operation examples described below are based on the following proposals.

File plan 1

Information of access categories supported by the network is included in the signaling of the NAS.

The terminal uses different access categories depending on the access categories supported by the network, even for the same access.

File plan 2

The mapping table is maintained as a terminal setting.

Mapping to the access category is performed based on version information contained in the broadcast information.

Fig. 5 shows an example of operations related to access restriction in the wireless communication system 10. Fig. 6 shows a flow of access control operation of the UE 200 corresponding to the network-based access restriction.

In fig. 5, an example is shown in which the UE 200 acquires information of access categories supported by the network in location registration with the network including the NG-RAN 20 and 5 GC.

Specifically, the UE 200 transmits a registration request to the network (Registration Request). Specifically, registration Request is sent to an access and mobility management function (Access and Mobility Management Function: AMF) within the core network.

The network includes information on access categories supported by the network in a registration accept (Registration Accept) notifying that the registration of the UE 200 is accepted according to Registration Request.

Regarding access categories not supported by the network (old generation network), the new generation terminal (UE 200) maps (changes) to the access categories of the old generation.

On the other hand, when the network supports the new-generation access class, that is, when Release-16 is supported, the new-generation terminal (UE 200) is directly used without changing the access class.

As shown in fig. 6, the UE 200 acquires information on access categories supported by the network (S10). As described above, the information of the access categories may be a list of numbers, or may be the maximum value of the supported access categories.

The UE 200 determines whether the network supports a new generation access class based on the acquired access class information (S20).

When the network supports the new generation access class, the UE 200 directly maps to the new generation access class (for example, class 9) when using the new generation access class (S30).

On the other hand, in the case where the network does not support the new generation access class, the UE 200 maps to the old generation access class (for example, class 4) even when the new generation access class is used (S40). That is, the UE 200 switches from the new generation access class to the old generation access class.

The UE 200 performs access control according to the mapped access category (S50).

Fig. 7 shows a conversion table of access categories and a configuration example of broadcast information from a network. The conversion table shown in fig. 7 can be used in step S40 shown in fig. 6.

As shown in fig. 7, the conversion table 251 shows the association of the Access Category (AC) of the new generation (described as version M) with the Access Category of the old generation (described as version N).

As shown in fig. 7, AC 3-7 has no change between versions M, N, and AC9 is converted to AC4.

Broadcast information from the network shown on the right side of fig. 7 (alternatively, registration Accept described above) is according to version N (e.g., release-15). Therefore, no provision is made for Access Category of the new generation.

As shown in fig. 7, the broadcast information may include information of association of each AC with an index of the restriction parameter. The restriction parameter may also include a restriction rate, a restriction time (time when access restriction is applied to the UE 200), and the like.

In fig. 7, only the conversion table from the version M (e.g., release-16) to the version N is shown, but the version of the table may be increased each time the access class specified as the standard increases. For example, release-15 as version 0, as described above, release-16 may be version 1, etc. due to the addition of category 9. In addition, the broadcast information may include a version number after version 1 (M).

The terminal presets a conversion table applied between a version (e.g., M) according to which the NAS layer itself is based and its previous version for the AS layer, and holds it. For example, if m=3, n=1, the terminal may maintain a conversion table from version 3 to 2, from 3 to 1, and from 3 to 0. In addition, the terminal may not necessarily hold all of the conversion tables.

In addition, the NAS layer judges the number of the access category according to the version according to the NAS layer, and inquires whether the restriction exists or not to the AS layer. The AS layer selects a corresponding conversion table according to the version number of the broadcast information and converts the number of the access category. The subsequent actions including access control are performed according to the number of the converted access class.

(4) Action and Effect

According to the above embodiment, the following operational effects can be obtained. Specifically, the UE 200 receives association information of access restrictions supported by the network, and determines access attributes such as an access category used when accessing the network, based on the received association information. Further, the UE 200 performs access to the network as access based on the determined access attribute.

Therefore, even when the UE 200 as a new generation terminal accesses the old generation network using the new access attribute such as the access class for expansion, by applying the access restriction to the UE 200, the UE 200 can perform an appropriate operation according to the intention of the operator.

In the present embodiment, the UE 200 can change the access class of the UE 200 to the access class supported by the old generation network based on the association information of the access restrictions supported by the network. Therefore, even in the case of accessing the old generation network in an access class not supported by the old generation network, the UE 200 can reliably apply the access restriction for the UE 200.

In the present embodiment, the UE 200 can use a table (conversion table 251) indicating the association between the access category of the terminal and the access category supported by the network. Therefore, the change of the access category can be easily and flexibly realized.

As described above, the Access type is not limited to the Access type, and the UE 200 may change the call type used by the UE 200 to the terminal set type supported by the network based on the association information of the Access restriction for the terminal set type (Access Identity). In this case, a table indicating the association between the terminal setting type used by the terminal and the terminal setting type supported by the network can be used.

Therefore, not only the Access category but also, even when a terminal accesses an old generation network using a new terminal setting category, the UE 200 can perform an appropriate operation according to the intention of the operator by applying Access restriction to the UE 200. The terminal setting type may be referred to as other names such as access identification information and mobile station type.

(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 description was given of an example in which Registration Accept or broadcast information is used as the method of notifying the association information of the access restriction supported by the network, but the association information may be included in the following message.

CONFIGURATION UPDATE COMMAND (message to update the terminal's settings)

DL NAS TRANSPORT (message of container for data sent to terminal)

RRC Connection setup (Signal from network side for establishing resources for Wireless)

RRC Connection reconfiguration (Signal from network side for changing radio setting)

In addition, the association information may not always be notified. Alternatively, the same information may be held (preset) in advance in the UE 200 without notifying the related information.

In the above-described embodiment, the access attribute such as the access category was changed to the access attribute supported by the network, but it may be interpreted as selecting a predetermined specific access category or the like, or may be interpreted as selecting a specific access category or the like designated by the network.

The block diagram (fig. 2) used in the description of the above embodiment shows modules 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 (broadcast), notification (notification), communication (communication), forwarding (forwarding), configuration, reconfiguration (allocation), allocation (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 UE 200 described above may also function as a computer that performs the processing of the wireless communication method of the present disclosure. Fig. 8 is a diagram showing an example of a hardware configuration of the UE 200. As shown in fig. 8, the UE 200 may be configured as a computer device including a processor 1001, a memory (memory) 1002, a storage (storage) 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

In the following description, the term "device" may be replaced with "circuit", "apparatus", "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 UE 200 (see fig. 2) may be realized by any hardware elements of the computer device or a combination of the hardware elements.

Further, the functions in the UE 200 are realized by the following methods: 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) 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. The various processes described above may be executed by one processor 1001, or 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 Read Only Memory (Erasable Programmable ROM: EPROM), an electrically erasable programmable Read Only Memory (Electrically Erasable Programmable ROM: EEPROM), a random access Memory (Random Access Memory: RAM), and the like, for example. Memory 1002 may also be referred to as a register, cache, main memory (main storage), etc. The memory 1002 may store programs (program codes), software modules, and the like capable of performing 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 Compact Disc ROM (CD-ROM), a hard disk drive, a flexible disk, a magneto-optical disk (for example, a Compact Disc, a digital versatile Disc, a Blu-ray (registered trademark) Disc, a smart card, a flash memory (for example, a card, a stick, a Key drive (Key drive)), a flowpy (registered trademark) Disc, 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 (Frequency Division Duplex: FDD) and time division duplexing (Time Division Duplex: TDD).

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 (Application Specific Integrated Circuit: ASIC), a programmable logic device (Programmable Logic Device: PLD), a field programmable gate array (Field Programmable Gate Array: FPGA), or the like, and part or all of the functional blocks may be realized by the hardware. For example, the processor 1001 may also be installed using at least one of these hardware.

Further, the notification of the information is not limited to the form/embodiment described in the present disclosure, and may be performed using other methods. For example, the notification of information may be implemented by physical layer signaling (e.g., downlink control information (Downlink Control Information: DCI), uplink control information (Uplink Control Information: UCI)), higher layer signaling (e.g., RRC signaling, MAC (Medium Access Control: medium access control) signaling, broadcast information (master information block (Master Information Block: MIB)), system information block (System Information Block: SIB)), other signals, or a combination thereof. In addition, the RRC signaling may also be referred to as an RRC message, for example, an RRC connection creation (RRC Connection Setup) message, an RRC connection reconfiguration (RRC Connection Reconfiguration) message, and the like.

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), CDMA 2000, ultra mobile broadband (Ultra Mobile Broadband: UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE802.16 (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), and the like can be output from a higher layer (or a lower layer) to a lower layer (or a higher layer). Or may be input or output via a plurality of network nodes.

The input or output information and the like may be stored in a specific location (for example, a memory), or may be managed using a management table. Information input or output, etc. may be rewritten, updated, or recorded. The outputted information and the like may also be deleted. The input information and the like may also be transmitted 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 embodiments described in the present disclosure may be used alone, in combination, or switched according to execution. 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 (Digital Subscriber Line: DSL), 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.

Further, the terms described in the present disclosure and 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 (Component Carrier: CC) may be referred to as a carrier frequency, a cell, a frequency carrier, or the like.

The terms "system" and "network" and the like 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 names in any respect. Further, the numerical formulas and the like using these parameters may also differ from those explicitly shown in the present disclosure. 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 non-limiting names in any respect.

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

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 (UE)", "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 internet of things (Internet of Things: ioT) 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.

Further, a subframe may 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 subcarrier spacing (SubCarrier Spacing: SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (Transmission Time Interval: TTI), number of symbols per TTI, radio frame structure, specific filtering process performed by the transceiver in the frequency domain, 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), a plurality of consecutive subframes may also be referred to as a TTI, and 1 slot or 1 mini slot may also be referred to as a TTI. 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 (e.g., the number of symbols) in which a transport block, a code block, a codeword, etc. are 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, 1 or more TTIs (i.e., 1 or more slots or 1 or more mini slots) may become 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 TTIs, etc.), a TTI having a TTI length less than the long TTI (long TTI) and having a TTI length of 1ms or more 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 (Bandwidth Part: BWP) (which may also be referred to as partial Bandwidth, etc.) represents a subset of 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 configuration of each device 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 calls are referred to as simple ways of distinguishing between two or more elements and are used in this disclosure. 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 terms "determine" and "determining" may include, for example, cases where "determination" and "determining" are regarded as matters of determining (determining), calculating (calculating), processing (processing), deriving (deriving), investigating (searching), searching (looking up, search, inquiry) (for example, searching in a table, a database or other data structure), and confirming (evaluating). Further, "determining" or "deciding" may include a matter that receives (e.g., receives information), transmits (e.g., transmits information), inputs (input), outputs (output), accesses (e.g., accesses data in a memory) as "determining" or "deciding". 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. Further, "judgment (decision)" may be replaced with "assumption", "expectation", and "consider (confirm)".

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 may also be similarly 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 NG-RAN

100 gNB

200 UE

210. Radio transmitter

220. Radio receiver

230. Network information acquisition unit

240. Support determination unit

250. Form holding part

251. Conversion table

260. Access control 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 (5)

1. A terminal, wherein the terminal has:

a receiving unit that receives, from a network, association information of access restrictions supported by the network; and

A control unit that decides an access attribute to be used when accessing to the network based on the association information,

the control section performs access to the network with access based on the determined access attribute,

the terminal is a new generation terminal, the network is an old generation network,

the association information of the access restriction at least includes any one of an access category supported by the network, a version supported by the network, or a terminal setting category supported by the network.

2. The terminal of claim 1, wherein,

the control unit changes the access class of the terminal to the access class supported by the network based on the association information.

3. The terminal of claim 2, wherein,

the control unit changes the access category according to a table indicating the association between the access category of the terminal and the access category supported by the network.

4. The terminal of claim 1, wherein,

the control unit changes the terminal setting type used by the terminal to the terminal setting type supported by the network based on the association information.

5. The terminal of claim 4, wherein,

The control unit changes the terminal setting type according to a table indicating the association between the terminal setting type used by the terminal and the terminal setting type supported by the network.