Terminal, base station, and wireless communication method

Abstract

To provide a terminal and a wireless communication method that can appropriately control cell selection and / or cell re-selection.SOLUTION: In a wireless communication system, a terminal 10 comprises: a reception unit that receives lowest reception level information related to the lowest reception level for a terminal with a specific number of antennas in a specific cell, and / or lowest quality level information related to the lowest quality level for a terminal with a specific number of antennas in a specific cell; and a control unit that controls a cell selection and / or a cell re-selection on the basis of a reception level parameter that is derived on the basis of the lowest reception level information and / or a quality level parameter that is derived from the lowest quality level information.SELECTED DRAWING: Figure 14

Description

Cross-reference of related applications

[0001] This application is based on Japanese Patent Application No. 2021-055161, filed on 29 March 2021, and claims the benefit of that priority, the entirety of which is incorporated herein by reference. [Technical Field]

[0002] This disclosure relates to terminals and wireless communication methods. [Background technology]

[0003] The Third Generation Partnership Project (3GPP), an international standardization organization, has specified Release 15 of New Radio (NR), a fifth-generation (5G) RAT, as a successor to Long Term Evolution (LTE), a third- and ninth-generation RAT, and LTE-Advanced (see, for example, Non-Patent Document 1). LTE and / or LTE-Advanced are also known as Evolved Universal Terrestrial Radio Access (E-UTRA).

[0004] E-UTRA and / or NR perform cell selection, where the terminal selects a cell to camp on, and / or cell re-selection, where the terminal re-selects that cell. [Prior art documents] [Non-patent literature]

[0005] [Non-Patent Document 1] 3GPP TS 38.300 V15.2.0 (2018-06) [Overview of the project]

[0006] 3GPP (for example, NR Release 17) is considering supporting NR terminals (hereinafter referred to as "Reduced Capability (RedCap) terminals") that are designed for lower performance and price ranges than NR terminals introduced in Release 15 or 16 (hereinafter referred to as "existing NR terminals"). It is also being considered to define such RedCap terminals as a specific type of terminal. Furthermore, it is being considered to support terminals with a specific number of antennas reduced from a given number of antennas (e.g., 4 or 2 receiving antennas) (e.g., terminals with one or two receiving antennas).

[0007] The coverage of terminals of the aforementioned specific types and / or specific numbers of antennas is expected to be reduced compared to existing NR terminals and / or terminals with more antennas than the aforementioned specific number. Therefore, terminals of the specific types and / or specific numbers of antennas may not be able to properly select and / or re-select cells for camp-on during cell selection and / or cell re-selection. One of the objectives of this disclosure is to provide a terminal and wireless communication method capable of appropriately controlling cell selection and / or cell re-selection.

[0008] A terminal according to one aspect of the present disclosure includes a receiving unit that receives minimum reception level information relating to the minimum reception level for a terminal with a specific number of antennas in a specific cell, and / or minimum quality level information relating to the minimum quality level for a terminal with a specific number of antennas in the specific cell, and a control unit that controls cell selection and / or cell re-selection based on reception level parameters derived based on the minimum reception level information, and / or quality level parameters derived based on the minimum quality level information. A terminal according to one aspect of the present disclosure also includes a receiving unit that receives minimum reception level information relating to the minimum reception level in a specific cell, and / or minimum quality level information relating to the minimum quality level in the specific cell, and a control unit that controls cell selection and / or cell re-selection based on reception level parameters derived based on the minimum reception level derived based on the minimum reception level information and an offset for a terminal with a specific number of antennas to the minimum reception level, and / or quality level parameters derived based on the minimum quality level derived based on the minimum quality level information and an offset for a terminal with a specific number of antennas to the minimum quality level.

[0009] According to one aspect of this disclosure, cell selection and / or cell re-selection can be appropriately controlled. [Brief explanation of the drawing]

[0010] [Figure 1] Figure 1 shows an example of the overview of the wireless communication system according to this embodiment. [Figure 2] Figure 2 shows an example of coverage degradation for terminal 10 of a specific type and / or a specific number of antennas. [Figure 3] Figure 3 shows an example of the access prohibition determination process according to this embodiment. [Figure 4] Figure 4 shows an example of specification changes related to RedCap access information and single Rx access information according to this embodiment. [Figure 5] Figure 5 shows an example of the cell selection criterion S1 according to this embodiment. [Figure 6] Figure 6 shows an example of a specification change regarding the cell selection criterion S1 according to this embodiment. [Figure 7] Figure 7 shows an example of a specification change regarding the cell selection criterion S1 according to this embodiment. [Figure 8] Figure 8 shows an example of a specification change regarding the cell selection criterion S1 according to this embodiment. [Figure 9] Figure 9 shows an example of the cell selection criterion S2 according to this embodiment. [Figure 10] Figure 10 shows an example of a specification change regarding the cell selection criterion S2 according to this embodiment. [Figure 11] Figure 11 shows an example of a specification change regarding the cell selection criterion S2 according to this embodiment. [Figure 12] Figure 12 shows an example of a specification change regarding the cell selection criterion S2 according to this embodiment. [Figure 13] Figure 13 shows an example of the hardware configuration of each device in the wireless communication system according to this embodiment. [Figure 14] Figure 14 shows an example of the functional block configuration of a terminal according to this embodiment. [Figure 15] Figure 15 shows an example of the functional block configuration of a base station according to this embodiment. [Modes for carrying out the invention]

[0011] Embodiments of this disclosure will be described with reference to the attached drawings. In each drawing, components denoted by the same reference numerals may have the same or similar configurations.

[0012] Figure 1 shows an example of the overview of a wireless communication system according to this embodiment. As shown in Figure 1, the wireless communication system 1 may include a terminal 10, a base station 20, and a core network 30. Note that the number of terminals 10 and base stations 20 shown in Figure 1 is merely illustrative and is not limited to the number shown.

[0013] For the radio access technology (RAT) of wireless communication system 1, NR is a possible example, but it is not limited to this; various RATs, such as 6th generation or later RATs, can be used.

[0014] Terminal 10 is a predetermined terminal or device, such as a smartphone, personal computer, in-vehicle terminal, in-vehicle device, stationary device, or telematics control unit (TCU). Terminal 10 may also be called User Equipment (UE), Mobile Station (MS), User Terminal, Radio apparatus, subscriber terminal, access terminal, etc. Terminal 10 may be mobile or fixed. Terminal 10 is configured to communicate using, for example, NR as a RAT.

[0015] The base station 20 forms one or more cells C and communicates with the terminal 10 using these cells. Cell C may be referred to as a serving cell, carrier, component carrier (CC), etc. For example, the base station 20 may configure one primary cell and one or more secondary cells for communication with the terminal 10 (also called carrier aggregation). That is, one or more cells C may include at least a primary cell and may include secondary cells.

[0016] The base station 20 may also be called a gNodeB (gNB), en-gNB, Next Generation-Radio Access Network (NG-RAN) node, low-power node, Central Unit (CU), Distributed Unit (DU), gNB-DU, Remote Radio Head (RRH), Integrated Access and Backhaul / Backhauling (IAB) node, etc. The base station 20 is not limited to a single node, but may consist of multiple nodes (for example, a combination of lower-level nodes such as DUs and higher-level nodes such as CUs).

[0017] The core network 30 is, for example, a core network compatible with NR (5G Core Network: 5GC), but is not limited to this. Devices on the core network 30 (hereinafter also referred to as "core network devices") perform mobility management such as paging and location registration of terminals 10. The core network devices may be connected to base stations 20 via a predetermined interface (for example, S1 or NG interface).

[0018] The core network device may include, for example, at least one of the following: an Access and Mobility Management Function (AMF) that manages C-plane information (e.g., information related to access and mobility management, etc.) and a User Plane Function (UPF) that controls the transmission of U-plane information (e.g., user data).

[0019] In the wireless communication system 1, terminal 10 receives downlink (DL) signals from base station 20 and / or transmits uplink (UL) signals. Terminal 10 is configured with one or more cells C, and at least one of the configured cells is activated. The maximum bandwidth of each cell is, for example, 20 MHz or 400 MHz.

[0020] Furthermore, terminal 10 performs a cell search based on synchronization signals from base station 20 (e.g., Primary Synchronization Signal (PSS) and / or Secondary Synchronization Signal (PSS)). Cell search is a procedure in which terminal 10 acquires the synchronization of time and frequency in a cell and detects the identifier of that cell (e.g., physical layer cell ID). The block containing the above synchronization signals, broadcast channels (e.g., Physical Broadcast Channel (PBCH)), and demodulation reference signals (DMRS) for the broadcast channels is also called a Synchronization Signal Block (SSB), SS / PBCH block, etc. The SSB is provided at predetermined intervals.

[0021] For example, terminal 10 receives a Master Information Block (MIB) via the PBCH. Terminal 10 may determine whether a cell is a cell on which access is prohibited (hereinafter referred to as a "barred cell") based on a parameter in the MIB (for example, "cellBarred"). If the cell is a barred cell, terminal 10 may re-select another cell with the same carrier frequency as the barred cell. The parameter may also be called an Information Element (IE), etc.

[0022] On the other hand, if the cell is not a prohibited cell, the terminal 10 may obtain a System Information Block (SIB) (e.g., SIBx, x=1, 2, ...) via a downlink shared channel (e.g., Physical Downlink Shared Channel: PDSCH) based on the MIB. Specifically, the terminal 10 may determine a search space and / or a Control Resource Set (CORESET) based on a parameter in the MIB (e.g., "pdcch-ConfigSIB1") and perform monitoring of Downlink Control Information (DCI) within the search space associated with the CORESET. This DCI monitoring is also called blind decoding. The terminal 10 receives SIB1 via a PDSCH scheduled by the DCI detected within the search space. The terminal 10 may also receive other SIBs (e.g., SIB2 and SIB4, etc.) via a PDSCH scheduled by the DCI. The system information may include the MIB and / or SIBs.

[0023] Here, the DCI may include one or more DCI formats. A DCI in a predetermined format may be called a DCI format. The DCI used for scheduling a PDSCH that transmits the above SIB (e.g., SIB1, 2, or 4) may have Cyclic Redundancy Check (CRC) bits (also called CRC parity bits) attached to it, which are scrambled with a predetermined identifier (e.g., System Information radio network temporary identifier: SI-RNTI). The DCI may also be, for example, a downlink assignment used for scheduling a PDSCH (e.g., DCI format 1_0).

[0024] (Select / Reselect Cells) A connected terminal 10 in an idle, inactive, or running state selects and / or re-selects a cell to camp on (hereinafter referred to as a "camp-on cell") based on predetermined criteria (hereinafter referred to as "cell selection criteria"). A camp-on cell may also be referred to as, for example, a "local cell," "suitable cell," or "better cell."

[0025] Here, the idle state is a state in which terminal 10 has not established a Radio Resource Control (RRC) layer connection (hereinafter referred to as "RRC connection") with base station 20, and is also called RRC_IDLE, idle mode, RRC idle mode, etc. Terminal 10 in the idle state receives system information broadcast by the camp-on cell. When an RRC connection is established, terminal 10 in the idle state transitions to the connected state.

[0026] Furthermore, the inactive state is a state in which the above-mentioned RRC connection is established but suspended, and is also called the RRC_INACTIVE state, inactive mode, RRC inactive mode, etc. Terminal 10 in the inactive state receives system information broadcast by the camp-on cell. Terminal 10 in the inactive state transitions to the connected state when the RRC connection is resumed, and transitions to the idle state when the RRC connection is released.

[0027] The connected state is the state in which the above-mentioned RRC connection is established, and is also called the RRC_CONNECTED state, connected mode, RRC connected mode, etc. Terminal 10 in the connected state transitions to the idle state when the RRC connection is released, and transitions to the inactive state when the RRC connection is paused.

[0028] In cell selection, terminal 10 selects a camp-on cell based on the cell selection criterion S. For example, terminal 10 may select a cell that satisfies the cell selection criterion S from the strongest cell of each carrier frequency, which has been searched by cell search, as a camp-on cell. Note that the carrier frequency is identified by a predetermined number (e.g., Absolute Radio Frequency Channel Number (ARFCN)) and can be rephrased as RF reference frequency, NR frequency, EUTRA frequency, center frequency, channel raster, frequency, etc. One or more cells C may be provided for each carrier frequency.

[0029] In cell reselection, terminal 10 re-selects a better cell than the one selected by cell selection, based on the cell selection criterion S. In cell reselection, for example, a cell with the same carrier frequency as the camp-on cell (hereinafter referred to as "intra-frequency") and / or a different carrier frequency from the camp-on cell (hereinafter referred to as "inter-frequency") may be re-selected. Furthermore, terminal 10 may control the re-selection of cells with the above intra-frequency and / or inter-frequency based on information regarding the priority of one or more carrier frequencies (hereinafter referred to as "priority information," for example, "CellReselectionPriority" and / or "CellReselectionSubPriority").

[0030] Next, the cell selection criterion S used in the above cell selection and / or cell reselection (hereinafter referred to as "cell selection / reselection") will be described. The cell selection criterion S is a criterion based on a parameter related to the reception level of a specific cell (hereinafter referred to as "Srxlev") and / or a parameter related to the quality level of a specific cell (hereinafter referred to as "Squal"). Srxlev and Squal are also called reception level parameter and quality level parameter, respectively. The cell selection criterion S may be that the Srxlev and / or Squal exceed a predetermined value (for example, 0), or may be represented by, for example, the following formula 1. [Formula 1] Srxlev > 0 and Squal > 0 Srxlev = Q rxlevmeas - (Q rxlevmin + Q rxlevminoffset ) - P compensation - Qoffset temp Squal = Q qualmeas - (Q qualmin + Q qualminoffset ) - Qoffset temp

[0031] As illustrated in Formula 1, Srxlev may be derived based on at least one of the following parameters. · The reception level measured by the terminal 10 for a specific cell (hereinafter referred to as "Q rxlevmeas ", for example, the reference signal received power (RSRP)) · The minimum reception level required in a specific cell (hereinafter referred to as "Q rxlevmin [[ID={36]]" · The offset for Q rxlevmin (hereinafter referred to as "Q rxlevminoffset ") · The compensation value based on the maximum transmission power of the terminal 10 (hereinafter referred to as "P compensation ") · The temporary offset applied to a specific cell (hereinafter referred to as "Qoffset temp ")

[0032] Furthermore, Squal may be derived based on at least one of the following parameters. • Quality measured for a specific cell by terminal 10 (hereinafter referred to as "Q") qualmeas For example, Reference Signal Received Quality (RSRQ) • The minimum quality level required for a specific cell (hereinafter referred to as "Q") qualmin ") Q qualmeas Offset to (hereinafter referred to as "Q") qualminoffset ") Qoffset temp

[0033] Note P compensation This may be a predetermined value, or a value based on the maximum transmission power level of terminal 10 ("P EMAX "P EMAX1 " and "P EMAX2 At least one of the following: (P) and / or the maximum RF output class of terminal 10 (P) PowerClass It may be derived based on ''. For example, in the frequency range (FR) 1 (e.g., 410MHz to 7125MHz), P compensation This may be calculated by the following equation 2. On the other hand, in FR2 (for example, 24250MHz to 52600MHz), P compensation This can be set to 0 (zero). [Formula 2] max(P EMAX1 - P PowerClass , 0) - (min(P EMAX2 , P PowerClass ) -min(P EMAX1 , P PowerClass )) (dB) or max(P EMAX1 - P PowerClass , 0) (dB)

[0034] Q rxlevmin Q rxlevminoffset Qoffset temp Q qualmin and Qqualminoffset Information regarding at least one of these may be provided in the system information. Specifically, Q rxlevmin Q rxlevminoffset Qoffset temp Q qualmin and Q qualminoffset Information relating to at least one of the following may be included in at least one of the first system information used for cell selection (e.g., SIB1), the second system information used for intra-frequency cell re-selection (e.g., SIB2), and the third system information used for inter-frequency cell re-selection (e.g., SIB4). Below, SIB1, SIB2, and SIB4 are given as examples of the first, second, and third system information, but it goes without saying that similar system information may be named differently from SIB1, SIB2, and SIB4. SIB1 includes information relating to cell selection (e.g., "cellSelectionInfo"), and this information is Q rxlevmin Q rxlevminoffset Qoffset temp Q qualmin and Q qualminoffset It may include information about at least one of the following. SIB2 includes information about intra-frequency cell reselection (e.g., "intraFreqCellReselectionInfo"), and such information is Q rxlevmin Q rxlevminoffset Qoffset temp Q qualmin and Q qualminoffset It may include information about at least one of the following. SIB4 includes information about cell reselection of inter-frequency (e.g., "InterFreqCarrierFreqInfo"), and such information is Q rxlevmin Q rxlevminoffset Qoffset temp Q qualmin and Q qualminoffset It may include information about at least one of the following.

[0035] (RedCap) 3GPP (for example, NR Release 17) is considering supporting RedCap terminals that are designed for lower performance and price ranges than existing NR terminals introduced in Release 15 or 16. These RedCap terminals are envisioned for use in applications such as industrial wireless sensors, video surveillance cameras, and wearable devices.

[0036] The capabilities of RedCap terminals that are reduced compared to existing NR terminals include, for example, the number of antennas (e.g., from 2 or 4 receiving antennas to 1 or 2 receiving antennas), the supported bandwidth (e.g., 20 MHz during initial access to FR1), the change from full duplex to half duplex, the maximum modulation scheme (e.g., from 256 QAM to 64 QAM), and at least one of the maximum number of Multiple Input and Multiple Output (MIMO) configurations. RedCap terminals may be identified by specific types. For example, existing NR terminals and RedCap terminals may be defined as different types (e.g., type 0 and type 1). The term "type" may also be expressed as UE type, category, UE category, etc.

[0037] Furthermore, RedCap terminals identified by a specific type may have different capabilities. For example, multiple RedCap terminals with different numbers of receiving antennas may be provided (e.g., RedCap terminals with a single receiving antenna, two receiving antennas, and three or more receiving antennas). Thus, multiple RedCap terminals with different capabilities may be identified by the above type or a subtype of the above type. Hereinafter, a terminal 10 or RedCap terminal with a single receiving antenna will be referred to as a "single Rx terminal." Similarly, a terminal 10 or RedCap terminal with two receiving antennas will be referred to as a "two Rx terminal." Note that having a single receiving antenna and having two receiving antennas can be rephrased as having a single receiver and a dual receiver, respectively.

[0038] The coverage of certain types of terminals (e.g., RedCap terminals) and / or terminals with a specific number of antennas (e.g., single Rx terminals or 2Rx terminals) is expected to be reduced compared to existing NR terminals or terminals with more antennas than the specific number. Figure 2 shows an example of the reduced coverage of certain types of terminals and / or terminals with a specific number of antennas. For example, in Figure 2, terminal 10A is a single Rx terminal, and terminal 10B is an existing NR terminal equipped with four receiving antennas.

[0039] For example, in Figure 2, Q is measured at terminal 10A of a single receiving antenna. rxlevmeas and Q qualmeas Because the effect of receive diversity cannot be obtained, it is lower than terminal 10B of multiple receiving antennas. On the other hand, terminals 10A and 10B have the same parameter value (for example, Q). rxlevmin Q rxlevminoffset Qoffset temp Q qualmin and Q qualminoffset When evaluating cell selection criteria S based on at least one of the following, terminal 10A's Q rxlevmeasand Q qualmeas Since terminal 10A is smaller than terminal 10B, the range in which terminal 10A satisfies the cell selection criterion S (for example, Srxlev>0 and Squal>0) may be reduced compared to the range in which terminal 10B satisfies the same cell selection criterion S. In other words, the coverage of terminal 10A may be reduced compared to the coverage of terminal 10B.

[0040] To complement the coverage of such specific types and / or terminals with a specific number of antennas (e.g., RedCap terminals and / or single Rx terminals), repeated channel transmission is also conceivable. However, repeated coverage expansion may reduce the efficiency of radio resource utilization (e.g., frequency domain resources and / or time domain resources).

[0041] Therefore, in this embodiment, (1) access to a specific cell by a terminal 10 of a specific type and / or a specific number of antennas is prohibited, thereby preventing a decrease in the utilization efficiency of wireless resources in that specific cell. Also, (2) access to a specific cell by a terminal 10 of a specific type and / or a specific number of antennas is permitted, while preventing a decrease in the coverage of the terminal 10.

[0042] In the following, we will assume, for example, that a specific type of terminal 10 is a RedCap terminal, and that a terminal 10 with a specific number of antennas is a single Rx terminal or a 2Rx terminal. However, it goes without saying that the specific type and / or specific number of antennas of terminal 10 are not limited to the above. For example, a terminal with a specific number of antennas may be any terminal with a number of antennas less than that of a terminal 10 with a predetermined number of antennas. For example, if the predetermined number of antennas is 8, then the specific number of antennas may be 4.

[0043] (1) If access is prohibited The following describes a case in which access to a specific cell is prohibited (restricted or not permitted) by at least one of a RedCap terminal, a single Rx terminal, and a 2Rx terminal. In this case, terminal 10 determines whether access to the specific cell is prohibited based on at least one of the following: information regarding RedCap terminal access to the specific cell (hereinafter referred to as "RedCap access information"), information regarding single Rx terminal access to the specific cell (hereinafter referred to as "single Rx access information"), and information regarding 2Rx terminal access to the specific cell (hereinafter referred to as "2Rx access information").

[0044] Here, RedCap access information refers to information regarding whether a RedCap terminal is permitted or denied access to a specific cell. In the following, RedCap access information refers to information regarding the permission of such access (for example, set to "true" or "1" when access is permitted), and is included in the system information (for example, SIB1) when such access is permitted, and not included in the system information when such access is denied, but is not limited to this. For example, RedCap access information may refer to information indicating the denial of such access (for example, set to "true" or "1" when access is denied), and may not be included in the system information when such access is permitted, but may be included in the system information when such access is denied.

[0045] Furthermore, single Rx access information and 2Rx access information are, for example, information regarding the permission or prohibition of access to a specific cell by single Rx terminals and 2Rx terminals, respectively. For example, single Rx access information and 2Rx access information are information regarding the permission of such access (for example, set to "true" or "1" when access is permitted), and are included in the system information (for example, SIB1) when such access is permitted, and not included in the system information when such access is prohibited, but are not limited to this. For example, single Rx access information and 2Rx access information indicate that such access is prohibited (for example, set to "true" or "1" when access is prohibited), and may not be included in the system information when such access is permitted, and may be included in the system information when such access is prohibited.

[0046] For example, terminal 10 receives system information. Terminal 10 may determine whether access to a particular cell is prohibited based on whether the RedCap access information is included in the system information, and / or whether the single Rx access information and / or 2Rx access information are included in the system information.

[0047] Furthermore, terminal 10 may determine whether access to the particular cell is prohibited based on whether terminal 10 is a RedCap terminal and / or whether terminal 10 is a single Rx terminal or a 2Rx terminal.

[0048] Figure 3 shows an example of the access prohibition determination operation according to this embodiment. In step S101, terminal 10 receives system information (for example, SIB1).

[0049] In step S102, terminal 10 determines whether it is in an idle state, an inactive state, or a connected state in which a specific timer (e.g., timer T311) is running. This specific timer defines the time until the RRC connection is re-established, and may be started when the re-establishment procedure is initiated and stopped when a specific cell is selected. When the specific timer expires, terminal 10 may transition to an idle state. If terminal 10 is in a connected state in which the specific timer is not running (step S102; NO), this operation ends.

[0050] In step S103, terminal 10 determines whether or not it is a RedCap terminal. If terminal 10 is not a RedCap terminal (step S103; NO), the operation proceeds to step S110.

[0051] On the other hand, if terminal 10 is a RedCap terminal (step S103; YES), in step S104, terminal 10 determines whether or not access to a specific cell by the RedCap terminal is permitted. For example, terminal 10 may determine whether or not RedCap access information is included in the system information received in step S101.

[0052] If access by a RedCap terminal to a specific cell is not permitted (step S104; NO), the process proceeds to step S109. On the other hand, if access by a RedCap terminal to a specific cell is permitted (step S104; YES), in step S105, terminal 10 determines whether access by a single Rx terminal to that specific cell is permitted. For example, terminal 10 may determine whether single Rx access information is included in the system information received in step S101. If access by a single Rx terminal to a specific cell is permitted (step S105; YES), the process proceeds to step S107.

[0053] If access by a single Rx terminal to a specific cell is not permitted (step S105; NO), in step S106, terminal 10 determines whether or not terminal 10 is a single Rx terminal. If terminal 10 is a single Rx terminal (step S106; YES), the operation proceeds to step S109. If terminal 10 is not a single Rx terminal (step S106; NO), the operation proceeds to step S107.

[0054] In step S107, terminal 10 determines whether or not the 2Rx terminal is permitted to access a specific cell. For example, terminal 10 may determine whether or not the system information received in step S101 contains 2Rx access information. If the 2Rx terminal is permitted to access a specific cell (step S107; YES), the operation proceeds to step S110.

[0055] If a 2Rx terminal is not allowed to access a specific cell (step S107; NO), in step S108, terminal 10 determines whether or not it is a 2Rx terminal. If terminal 10 is a 2Rx terminal (step S108; YES), the operation proceeds to step S109. If terminal 10 is not a 2Rx terminal (step S108; NO), the operation proceeds to step S110.

[0056] In step S109, terminal 10 determines that access to a specific cell is prohibited. As described above, terminal 10 can determine that access to a specific cell is prohibited using, for example, the following criteria. 1> if in RRC_IDLE or RRC_INACTIVE or in RRC_CONNECTED while T311 is running; 2> if the UE is a reduced capability UE according to TS 38.306

[26] : 3> if redCap-AccessAllowed is not included in SIB1; or 3>if redCap-AccessAllowed is set to true in SIB1, and singleRx-AccessAllowed is not included in SIB1, and the reduced capability UE supports no more than a single receiver; or 3> if redCap-AccessAllowed is set to true in SIB1, and twoRx-AccessAllowed is not included in SIB1, and the reduced capability UE supports no more than a dual receiver: 4> consider the cell as barred in accordance with TS 38.304

[20] ;

[0057] In step S110, terminal 10 decides whether or not to camp on to a specific cell based on the cell selection criterion S. Specifically, terminal 10 may camp on to the specific cell if that cell satisfies the cell selection criterion S.

[0058] Note that the decision-making process shown in Figure 3 is merely an example, and some steps may be omitted, or steps not shown may be added. Also, the order of at least some steps may be changed. For example, the decision order of steps 105 and S106 and steps S107 and S108 may be changed.

[0059] Figure 4 shows an example of specification changes regarding RedCap access information and single Rx access information according to this embodiment. For example, in Figure 4, the cell access information within SIB1 (e.g., "cellAccessRelatedInfo") includes RedCap access information (e.g., "redCap-AccessAllowed"), single Rx access information (e.g., "singleRx-AccessAllowed"), and 2Rx access information (e.g., "twoRx-AccessAllowed").

[0060] For example, in Figure 4, if RedCap terminal access to a specific cell is permitted, the RedCap access information is set to true and included in SIB1. Similarly, if single Rx terminal access to a specific cell is permitted, the single Rx access information is set to true and included in SIB1. Furthermore, if 2Rx terminal access to a specific cell is permitted, the 2Rx access information is set to true and included in SIB1.

[0061] Furthermore, single Rx access information may be conditional presence. Specifically, single Rx access information is included in SIB1 if the RedCap access information indicates permission for access from a RedCap terminal (for example, if it is set to true in Figure 4), and does not need to be included in SIB1 otherwise. Similarly, 2Rx access information may also be conditional presence. Specifically, 2Rx access information is included in SIB1 if terminal 10 is a cell on a frequency band where it is essential to support four receiving antennas, and does not need to be included in SIB1 otherwise.

[0062] Note that the specification change example shown in Figure 4 is just one example and is not limited to those illustrated. For example, at least one of the RedCap access information, single Rx access information, and 2Rx access information may be set to true when access is not permitted (i.e., restricted). Also, the single Rx access information and / or 2Rx access information do not have to be the conditional presence described above. Furthermore, SIB1 only needs to include at least one of the RedCap access information, single Rx access information, and 2Rx access information.

[0063] As described above, restricting access for RedCap terminals, single Rx terminals, and 2Rx terminals to at least one specific cell prevents a reduction in coverage for at least one of the RedCap terminals, single Rx terminals, and 2Rx terminals in that specific cell. This prevents a decrease in the efficiency of wireless resource utilization caused by repeated transmissions for coverage supplementation.

[0064] In the above, it is stated that the determination of whether or not access to a particular cell is prohibited is based on whether or not the RedCap access information is included in the system information, and / or whether or not the single Rx access information and / or 2Rx access information is included in the system information, but it is not limited to this. For example, if the RedCap access information, single Rx access information, or 2Rx access information is included in the system information regardless of whether the access is permitted or prohibited, terminal 10 may determine whether or not access to the particular cell is prohibited based on the value of the RedCap access information, single Rx access information, or 2Rx access information in the system information.

[0065] (2) In the case of permission Next, we will describe the case where access to a specific cell is permitted for at least one RedCap terminal, single Rx terminal, and 2Rx terminal. In this case, the coverage of at least one RedCap terminal, single Rx terminal, and 2Rx terminal may be extended by using cell selection criteria S1 or S2, which are derived by relaxing the cell selection criterion S above for single Rx terminals or 2Rx terminals.

[0066] The following explanation will primarily focus on the use of cell selection criteria S1 and S2 for single Rx terminals. However, when using cell selection criteria S1 and S2 for 2Rx terminals, "single Rx terminal" should be replaced with "2Rx terminal" below.

[0067] (2.1) Cell selection criteria S1 In cell selection criterion S1, terminal 10 is Q for single Rx terminals. rxlevmin Derive Srxlev based on and / or Q for a single Rx terminal qualmin Squal is derived based on this.

[0068] Specifically, terminal 10 is a Q for a single Rx terminal in a particular cell. rxlevmin Information regarding (hereinafter referred to as "Q") rxlevmin,SingleRx Information, and / or Q for a single Rx terminal in that particular cell. qualmin Information regarding (hereinafter referred to as "Q") qualmin,SingleRx Receive information (or "information"). Q rxlevmin,SingleRx The information can be rephrased as minimum reception level information for a single Rx terminal, Q qualmin,SingleRx The information can also be rephrased as minimum quality level information regarding the minimum quality level for a single Rx terminal. Also, Q rxlevmin,SingleRx Information and / or Q qualmin,SingleRx The information may be included in the system information. For example, see Q above. rxlevmin,SingleRx Information and / or Q qualmin,SingleRx The information may be included in at least one of the above SIB1, SIB2, and SIB4.

[0069] Terminal 10 is Q rxlevmin,SingleRxDerive Q for a single Rx terminal based on information, and derive Q for a single Rx terminal based on Q information. The terminal 10 may control cell selection / reselection based on Srxlev derived based on the Q for the single Rx terminal and Q measured in the specific cell, and / or based on Squal derived based on the Q for the single Rx terminal and Q measured in the specific cell. rxlevmin Derive Q qualmin,SingleRx Derive Q for a single Rx terminal based on information, and derive Q for a single Rx terminal based on Q information. qualmin The terminal 10 may control cell selection / reselection based on Srxlev derived based on the Q for the single Rx terminal and Q measured in the specific cell, and / or based on Squal derived based on the Q for the single Rx terminal and Q measured in the specific cell. rxlevmin And Q measured in the specific cell, and / or based on Squal derived based on the Q for the single Rx terminal and Q measured in the specific cell. rxlevmeas And Q measured in the specific cell, and / or based on Squal derived based on the Q for the single Rx terminal and Q measured in the specific cell. qualmin And Q measured in the specific cell, and / or based on Squal derived based on the Q for the single Rx terminal and Q measured in the specific cell. qualmeas And Q measured in the specific cell, and / or based on Squal derived based on the Q for the single Rx terminal and Q measured in the specific cell.

[0070] Note that Q for the single Rx terminal and Q may be smaller than Q and Q for terminals with a larger number of antennas (for example, single or two receiving antennas). rxlevmin And Q qualmin For terminals with a larger number of antennas than a specific number of antennas (for example, single or two receiving antennas). rxlevmin And Q qualmin For terminals with a larger number of antennas than a specific number of antennas (for example, single or two receiving antennas). rxlevmeas And Q measured by the single Rx terminal, and Q measured by the single Rx terminal may be smaller than Q and Q measured by the terminals with a larger number of antennas. qualmeas And Q measured by the single Rx terminal, and Q measured by the single Rx terminal may be smaller than Q and Q measured by the terminals with a larger number of antennas. rxlevmeas And Q measured by the single Rx terminal, and Q measured by the single Rx terminal may be smaller than Q and Q measured by the terminals with a larger number of antennas. qualmeas And Q measured by the single Rx terminal, and Q measured by the single Rx terminal may be smaller than Q and Q measured by the terminals with a larger number of antennas.

[0071] Figure 5 is a diagram showing an example of the cell selection criterion S1 according to the present embodiment. For example, the terminal 10 in Figure 5 is a single Rx terminal. As shown in Figure 5, Srxlev of the cell selection criterion S1 may be derived based on at least one of Q, Q, P, and Qoffset in addition to Q for the single Rx terminal. Also, Squal may be derived based on at least one of Q, Q, and Qoffset in addition to Q for the single Rx terminal. rxlevmin In addition to Q for the single Rx terminal, rxlevmeas Q rxlevminoffset P compensation And Qoffset temp Of at least one. qualmin In addition to Q for the single Rx terminal, qualmeas Q qualminoffset And Qoffset tempIt may be derived based on at least one of the following. Figure 5 illustrates an example of the formula for cell selection criterion S1, but it is only one example and is not limited to those shown. For example, if Srxlev and / or Squal of cell selection criterion S1 are greater than (or greater than) a predetermined value, the predetermined value is not limited to 0.

[0072] Q in cell selection criterion S1 rxlevmin Q is a parameter that is different from the parameter used in the cell selection criterion S (for example, "q-RxLevMin" or "q-RxLevMinSUL"). rxlevmin,SingleRx It is derived based on the information. For example, as shown in Figure 5, terminal 10 is a single Rx terminal and contains Q in SIB1, SIB2 and SIB4. rxlevmin,SingleRx If the information is included, and both the RedCap access information and the single Rx access information within SIB1 indicate permission to access a specific cell (for example, set to true), then Q rxlevmin Q rxlevmin,SingleRx It may be derived based on information (for example, "q-RxLevMinSingleRx").

[0073] Also, Q in cell selection criterion S1 qualmin Q is a parameter that is different from the parameter used in the cell selection criterion S (for example, "q-QualMin"). qualmin,SingleRx It is derived based on the information. For example, as shown in Figure 5, terminal 10 is a single Rx terminal and contains Q in SIB1, SIB2 and SIB4. qualmin,SingleRx If the information is included, and both the RedCap access information and the single Rx access information within SIB1 indicate permission to access a specific cell (for example, set to true), then Q qualmin Q qualmin,SingleRx It may be derived based on information (for example, "q-QualMinSingleRx").

[0074] Furthermore, when using the above cell selection criterion S1 for 2Rx terminals, the above Q rxlevmin,SingleRx The information is: "Q for 2Rx terminals in a specific cell" rxlevminInformation regarding (hereinafter referred to as "Q") rxlevmin,TwoRx It should be reinterpreted as "information"). Also, Q qualmin,SingleRx The information is: "Q for 2Rx terminals in a specific cell" qualmin Information regarding (hereinafter referred to as "Q") qualmin,TwoRx It should be reinterpreted as "information." rxlevmin,SingleRx One example of information is "q-RxLevMinSingleRx", which is Q rxlevmin,TwoRx It should be interpreted as "RxLevMinTwoRx," which is an example of the information. Also, Q qualmin,SingleRx One example of information is "q-QualMinSingleRx", which is Q qualmin,TwoRx For example, "q-QualMinTwoRx" can be interpreted as "q-QualMinTwoRx". Also, "Single Rx access information" can be interpreted as "2Rx access information".

[0075] Figures 6-8 show an example of a specification change regarding the cell selection criterion S1 according to this embodiment. For example, in Figure 6, the cell selection information in SIB1 (e.g., "cellSelectionInfo") contains Q rxlevmin,SingleRx Information (for example, "q-RxLevMinSingleRx"), Q qualmin,SingleRx Information (for example, "q-QualMinSingleRx"), Q rxlevmin,TwoRx Information (e.g., "RxLevMinTwoRx") and Q qualmin,TwoRx Information (for example, "q-QualMinTwoRx") is defined. rxlevmin,SingleRx Information and Q qualmin,SingleRx Information, or Q rxlevmin,TwoRx Information and Q qualmin,TwoRx The information is the cell selection criterion S1 Q when selecting a cell. rxlevmin and Q qualmin It may be used in the derivation of Q. Note that if terminal 10 is a single Rx terminal, rxlevmin,SingleRx Information and Q qualmin,SingleRx If the information is not included in SIB1, Q will be calculated based on existing parameters within SIB1 (e.g., "q-RxLevMin" and "q-QualMin"). rxlevmin and Q qualmin Derive the relevant Q rxlevmin and Q qualminCell selection may be controlled based on existing cell selection criteria S based on the above. Also, if terminal 10 is a 2Rx terminal, the Q rxlevmin,TwoRx Information and Q qualmin,TwoRx If the information is not included in SIB1, Q will be calculated based on existing parameters within SIB1 (e.g., "q-RxLevMin" and "q-QualMin"). rxlevmin and Q qualmin Derive the relevant Q rxlevmin and Q qualmin Cell selection may be controlled based on existing cell selection criteria S.

[0076] Also, Q rxlevmin,SingleRx Information and Q qualmin,SingleRx Information, Q rxlevmin,TwoRx Information and Q qualmin,TwoRx The information, and at least one of the cell selection information containing this information (e.g., "cellSelectionInfo"), may be conditional presence. Specifically, Q rxlevmin,SingleRx Information and Q qualmin,SingleRx The information is included in SIB1 if the single Rx access information indicates permission for single Rx terminal access (for example, if it is set to true in Figure 6), and does not need to be included in SIB1 otherwise. Also, Q rxlevmin,TwoRx Information and Q qualmin,TwoRx The information is included in SIB1 if the 2Rx access information indicates permission for access from the 2Rx terminal (for example, if it is set to true in Figure 6), but does not need to be included in SIB1 otherwise. Similarly, the information regarding cell selection is included in SIB1 if the RedCap access information indicates permission for access from the RedCap terminal (for example, if it is set to true in Figure 6), but does not need to be included in SIB1 otherwise.

[0077] In Figure 7, within the information regarding intra-frequency cell reselection in SIB2 (e.g., "intraFreqCellReselectionInfo"), Q rxlevmin,SingleRx Information (for example, "q-RxLevMinSingleRx"), Q qualmin,SingleRx Information (for example, "q-QualMinSingleRx"), Qrxlevmin,TwoRx Information (e.g., "RxLevMinTwoRx") and Q qualmin,TwoRx Information (for example, "q-QualMinTwoRx") is defined. rxlevmin,SingleRx Information and Q qualmin,SingleRx Information, or Q rxlevmin,TwoRx Information and Q qualmin,TwoRx The information is Q of the cell selection criterion S1 when re-selecting intra-frequency cells. rxlevmin and Q qualmin It may be used in the derivation of Q. Note that if terminal 10 is a single Rx terminal, rxlevmin,SingleRx Information and Q qualmin,SingleRx If the information is not included in SIB2, Q will be calculated based on existing parameters within SIB2 (for example, "q-RxLevMin" and "q-QualMin" in "intraFreqCellReselectionInfo"). rxlevmin and Q qualmin Derive the relevant Q rxlevmin and Q qualmin Cell re-selection may be controlled based on existing cell selection criteria S based on the above. Also, if terminal 10 is a 2Rx terminal, the Q rxlevmin,TwoRx Information and Q qualmin,TwoRx If the information is not included in SIB2, Q will be calculated based on existing parameters within SIB2 (for example, "q-RxLevMin" and "q-QualMin" in "intraFreqCellReselectionInfo"). rxlevmin and Q qualmin Derive the relevant Q rxlevmin and Q qualmin Cell re-selection may be controlled based on existing cell selection criteria S.

[0078] In Figure 8, the information for each inter-frequency (e.g., "InterFreqNeighCellInfo") within the list of inter-frequency information for SIB4 (e.g., "interFreqCarrierFreqList") is shown as Q rxlevmin,SingleRx Information (for example, "q-RxLevMinSingleRx"), Q qualmin,SingleRx Information (for example, "q-QualMinSingleRx"), Q rxlevmin,TwoRxInformation (e.g., "RxLevMinTwoRx") and Q qualmin,TwoRx Information (for example, "q-QualMinTwoRx") is defined. rxlevmin,SingleRx Information and Q qualmin,SingleRx Information, or Q rxlevmin,TwoRx Information and Q qualmin,TwoRx The information is Q of the cell selection criterion S1 during inter-frequency cell reselection. rxlevmin and Q qualmin It may be used in the derivation of Q. Note that if terminal 10 is a single Rx terminal, rxlevmin,SingleRx Information and Q qualmin,SingleRx If the information is not included in SIB4, then Q will be calculated based on existing parameters within SIB4 (for example, "q-RxLevMin" and "q-QualMin" in "InterFreqCarrierFreqInfo"). rxlevmin and Q qualmin Derive the relevant Q rxlevmin and Q qualmin Cell re-selection may be controlled based on existing cell selection criteria S based on the above. Also, if terminal 10 is a 2Rx terminal, the Q rxlevmin,TwoRx Information and Q qualmin,TwoRx If the information is not included in SIB4, then Q will be calculated based on existing parameters within SIB4 (for example, "q-RxLevMin" and "q-QualMin" in "InterFreqCarrierFreqInfo"). rxlevmin and Q qualmin Derive the relevant Q rxlevmin and Q qualmin Cell re-selection may be controlled based on existing cell selection criteria S.

[0079] As described above, according to cell selection criterion S1, Q for single Rx terminals or 2Rx terminals rxlevmin Srxlev is derived based on and / or Q for single Rx terminal or 2Rx terminal qualmin Since Squal is derived based on Q rxlevmeas and Q qualminThe range in which single-Rx or 2Rx terminals, whose measured values ​​are expected to be smaller than those of terminals with a larger number of antennas, satisfy cell selection criterion S1 can be expanded. Therefore, coverage for single-Rx or 2Rx terminals can be expanded.

[0080] (2.2) Cell selection criteria S2 In cell selection criterion S2, terminal 10 selects Q in a specific cell. rxlevmin Offset for single Rx terminal or 2Rx terminal (hereinafter referred to as "Q") rxlevminoffset,Rx Derive Srxlev based on the above, and / or Q in a particular cell. qualmin Offset for single Rx terminal or 2Rx terminal (hereinafter referred to as "Q") qualminoffset,Rx Squal is derived based on the following:

[0081] Specifically, terminal 10 is Q in a particular cell. rxlevmin Information regarding (hereinafter referred to as "Q") rxlevmin Information), and / or Q in that particular cell qualmin Information regarding (hereinafter referred to as "Q") qualmin Receive information (or "information"). Q rxlevmin The information can be rephrased as minimum reception level information regarding the minimum reception level, Q qualmin The information can also be described as minimum quality level information regarding the minimum quality level.

[0082] Also, Q rxlevmin Information and / or Q qualmin The information may be included in the system information. For example, see Q above. rxlevmin Information and / or Q qualmin The information may be included in at least one of the above SIB1, SIB2, and SIB4. Terminal 10 is Q rxlevmin Q based on the information rxlevmin This is derived. Also, terminal 10 is Q qualmin Q based on the information qualmin Derive the following. Note that Q rxlevmin and Q qualmin This may be common to single-Rx terminals, 2Rx terminals, and terminals with a large number of antennas as described above.

[0083] Terminal 10 is Q rxlevmin Q rxlevmin Q for single Rx terminal or 2Rx terminal rxlevminoffset,Rx and Q measured in a specific cell rxlevmeas Srxlev, and / or Q, are derived based on this. qualmin Q qualmin Q for single Rx terminal or 2Rx terminal qualminoffset,Rx and Q measured in a specific cell qualmeas The Squal derived based on this may be used to control cell selection / re-selection.

[0084] Figure 9 shows an example of the cell selection criterion S2 according to this embodiment. For example, terminal 10 in Figure 9 is a single Rx terminal. As shown in Figure 9, Srxlev of the cell selection criterion S2 is Q rxlevmin Q rxlevmeas Q rxlevminoffset Q rxlevminoffset,Rx , P compensation and Qoffset temp It may be derived based on at least one of the following. Also, Squal is Q qualmin Q qualmeas Q qualminoffset Q qualminoffset,Rx and Qoffset temp It may be derived based on at least one of the following. Figure 9 illustrates an example of the formula for cell selection criterion S2, but it is only one example and is not limited to those shown. For example, if Srxlev and / or Squal of cell selection criterion S2 are greater than (or greater than) a predetermined value, the predetermined value is not limited to 0.

[0085] Q in cell selection criterion S2 rxlevminoffset,Rx and / or Q qualminoffset,Rx Q may be a predetermined value (for example, a value defined in the specifications). Alternatively, terminal 10 may be Q rxlevminoffset,Rx Information regarding (hereinafter referred to as "Q") rxlevminoffset,Rx Information) is received, and the received Q rxlevminoffset,Rx Q based on the information rxlevminoffset,Rx You may also derive Q. Also, terminal 10 is Q qualminoffset,RxInformation regarding (hereinafter referred to as "Q") qualminoffset,Rx Information) is received, and the received Q qualminoffset,Rx Q based on the information qualminoffset,Rx You may derive this.

[0086] Q rxlevminoffset,Rx The information is Q rxlevmin This can also be rephrased as information regarding the offset to Q. qualminoffset,Rx The information is Q qualmin This can be rephrased as information regarding the offset to Q. rxlevminoffset,Rx Information and / or Q qualminoffset,Rx The information may be included in the system information. For example, Q rxlevminoffset,Rx Information and / or Q qualminoffset,Rx The information may be included in at least one of SIB1, SIB2, and SIB4.

[0087] Also, Q rxlevminoffset,Rx The information is Q rxlevmin Information regarding the offset for single Rx terminals (hereinafter referred to as "Q") rxlevminoffset,SingleRx Information, for example, "q-RxLevMinOffsetSingleRx", and / or Q rxlevmin Information regarding the offset for 2Rx terminals (hereinafter referred to as "Q") rxlevminoffset,TwoRx The information may include, for example, "q-RxLevMinOffsetTwoRx". Also, Q rxlevminoffset,Rx The information is Q qualmin Information regarding the offset for single Rx terminals (hereinafter referred to as "Q") qualminoffset,SingleRx Information, for example, "q-RxLevMinOffsetSingleRx", and / or Q qualmin Information regarding the offset for 2Rx terminals (hereinafter referred to as "Q") qualminoffset,TwoRx The information may include, for example, "q-RxLevMinOffsetTwoRx".

[0088] Cell selection criterion S2 is for single Rx terminals or 2Rx terminals. rxlevminoffset,Rx and / or Q qualminoffset,Rx Since Q is used, rxlevmeas and Q qualmeasThe range in which single-Rx or 2Rx terminals, whose measured values ​​are expected to be smaller than those of terminals with a larger number of antennas, satisfy cell selection criterion S2 can be expanded. Therefore, coverage for single-Rx or 2Rx terminals can be expanded.

[0089] Figures 10-12 show an example of a specification change regarding the cell selection criterion S2 according to this embodiment. For example, in Figure 10, the cell selection information in SIB1 (e.g., "cellSelectionInfo") contains Q rxlevminoffset,SingleRx Information (for example, "q-RxLevMinOffsetSingleRx"), Q qualminoffset,SingleRx Information (for example, "q-QualMinOffsetSingleRx"), Q rxlevminoffset,TwoRx Information (e.g., "q-RxLevMinOffsetTwoRx") and Q qualminoffset,TwoRx Information (for example, "q-QualMinOffsetTwoRx") is defined. rxlevminoffset,SingleRx Information and Q qualminoffset,SingleRx Information, or Q rxlevminoffset,TwoRx Information and Q qualminoffset,TwoRx The information is the cell selection criterion S2 Q when selecting a cell. rxlevmin and Q qualmin It may be used as an offset for Srxlev and Squal in the derivation of Q. Note that when terminal 10 is a single Rx terminal, the Q rxlevminoffset,SingleRx Information and Q qualminoffset,SingleRx If the information is not included in SIB1, terminal 10 will select Q in cell selection criterion S2. rxlevminoffset,Rx and Q qualminoffset,Rx You can also apply the default value (for example, 0 (zero)) to it. Also, if terminal 10 is a 2Rx terminal, Q rxlevminoffset,TwoRx Information and Q qualminoffset,TwoRx If the information is not included in SIB1, terminal 10 will Q rxlevminoffset,Rx and Q qualminoffset,Rx Alternatively, you can apply a default value (for example, 0 (zero)).

[0090] Also, Q rxlevminoffset,SingleRx Information and Q qualminoffset,SingleRx Information, Q rxlevminoffset,TwoRx Information and Q qualminoffset,TwoRxThe information, and at least one of the cell selection information containing this information (e.g., "cellSelectionInfo"), may be conditional presence. Specifically, Q rxlevminoffset,SingleRx Information and Q qualminoffset,SingleRx The information is included in SIB1 if the single Rx access information indicates permission for single Rx terminal access (for example, if it is set to true in Figure 10), and does not need to be included in SIB1 otherwise. Also, Q rxlevminoffset,TwoRx Information and Q qualminoffset,TwoRx The information is included in SIB1 if the 2Rx access information indicates permission for access from the 2Rx terminal (for example, if it is set to true in Figure 10), but does not need to be included in SIB1 otherwise. Similarly, the information regarding cell selection is included in SIB1 if the RedCap access information indicates permission for access from the RedCap terminal (for example, if it is set to true in Figure 10), but does not need to be included in SIB1 otherwise.

[0091] In Figure 11, within the information regarding intra-frequency cell reselection in SIB2 (e.g., "intraFreqCellReselectionInfo"), Q rxlevminoffset,SingleRx Information (for example, "q-RxLevMinOffsetSingleRx"), Q qualminoffset,SingleRx Information (for example, "q-QualMinOffsetSingleRx"), Q rxlevminoffset,TwoRx Information (e.g., "q-RxLevMinOffsetTwoRx") and Q qualminoffset,TwoRx Information (for example, "q-QualMinOffsetTwoRx") is defined. Q rxlevminoffset,SingleRx Information and Q qualminoffset,SingleRx Information, or Q rxlevminoffset,TwoRx Information and Q qualminoffset,TwoRx The information is the Q of the cell selection criterion S2 when re-selecting intra-frequency cells. rxlevmin and Q qualmin It may be used as an offset for Srxlev and Squal in the derivation of Q. Note that when terminal 10 is a single Rx terminal, Q rxlevminoffset,SingleRx Information and Q qualminoffset,SingleRx If the information is not included in SIB2, terminal 10 will select Q in cell selection criterion S2.rxlevminoffset,Rx and Q qualminoffset,Rx You can also apply the default value (for example, 0 (zero)) to it. Also, if terminal 10 is a 2Rx terminal, Q rxlevminoffset,TwoRx Information and Q qualminoffset,TwoRx If the information is not included in SIB2, terminal 10 will be Q rxlevminoffset,Rx and Q qualminoffset,Rx Alternatively, you can apply a default value (for example, 0 (zero)).

[0092] In Figure 12, Q is shown as the information for each inter-frequency (e.g., "InterFreqNeighCellInfo") within the list of inter-frequency information for SIB4 (e.g., "interFreqCarrierFreqList"). rxlevminoffset,SingleRx Information (for example, "q-RxLevMinOffsetSingleRx"), Q qualminoffset,SingleRx Information (for example, "q-QualMinOffsetSingleRx"), Q rxlevminoffset,TwoRx Information (e.g., "q-RxLevMinOffsetTwoRx") and Q qualminoffset,TwoRx Information (for example, "q-QualMinOffsetTwoRx") is defined. Q rxlevminoffset,SingleRx Information and Q qualminoffset,SingleRx Information, or Q rxlevminoffset,TwoRx Information and Q qualminoffset,TwoRx The information is the Q of the cell selection criterion S2 during inter-frequency cell reselection. rxlevmin and Q qualmin It may be used as an offset for Srxlev and Squal in the derivation of Q. Note that when terminal 10 is a single Rx terminal, Q rxlevminoffset,SingleRx Information and / or Q qualminoffset,SingleRx If the information is not included in SIB4, terminal 10 will select Q in cell selection criterion S2. rxlevminoffset,Rx and / or Q qualminoffset,Rx You can also apply the default value (for example, 0 (zero)) to it. Also, if terminal 10 is a 2Rx terminal, Q rxlevminoffset,TwoRx Information and / or Q qualminoffset,TwoRx If the information is not included in SIB4, terminal 10 will be Q rxlevminoffset,Rx and / or Q qualminoffset,Rx Alternatively, you can apply a default value (for example, 0 (zero)).

[0093] As described above, according to cell selection criterion S2, Q is for single Rx terminals or 2Rx terminals. rxlevminoffset,Rx Srxlev is derived based on and / or Q for single Rx terminal or 2Rx terminal qualminoffset,Rx Since Squal is derived based on Q rxlevmeas and Q qualmin The range in which single-Rx or 2Rx terminals, whose measured values ​​are expected to be smaller than those of terminals with a larger number of antennas, satisfy cell selection criterion S2 can be expanded. Therefore, coverage for single-Rx or 2Rx terminals can be expanded.

[0094] Note that cell selection criteria S1 and S2 may be combined. Specifically, Q for single Rx terminals or 2Rx terminals in cell selection criterion S1. rxlevmin and Q for single Rx terminals or 2Rx terminals in cell selection criterion S2 rxlevminoffset,Rx Srxlev may be derived based on this. Also, Q for single Rx terminals or 2Rx terminals in cell selection criterion S1 qualmin and Q for single Rx terminals or 2Rx terminals in cell selection criterion S2 qualminoffset,Rx Squal may be derived based on this.

[0095] As described above, when allowing access to at least one specific cell of a RedCap terminal, single Rx terminal, and 2Rx terminal, using cell selection criteria S1 and / or S2 can prevent a reduction in coverage of at least one of the RedCap terminal, single Rx terminal, and 2Rx terminal, and allow for appropriate control of cell selection / re-selection.

[0096] Note that the above cell selection criterion S1 is for Q for single Rx terminals or 2Rx terminals. rxlevmin and Q qualmin I explained this, but Q for RedCap terminals rxlevmin and Q qualmin It can, of course, also be applied to the above cell selection criterion S2, Q for single Rx terminals or 2Rx terminals. rxlevminoffset,Rxand Q qualminoffset,Rx I explained this, but Q for RedCap terminals rxlevminoffset and Q qualminoffset It can, of course, also be applied to this.

[0097] Furthermore, the above cases of (1) access prohibition and (2) access permission can be combined. For example, if access to a specific cell is prohibited, and access to cells with the same and / or different carrier frequencies as that specific cell is permitted, terminal 10 may control the re-selection of that cell based on the cell selection criteria S1 and / or S2.

[0098] (Configuration of the wireless communication system) Next, the configuration of each device in the wireless communication system 1 described above will be explained. Note that the following configuration is for illustrating the necessary configurations in this embodiment and does not preclude each device from having functional blocks other than those shown.

[0099] <Hardware Configuration> Figure 13 shows an example of the hardware configuration of each device in the wireless communication system according to this embodiment. Each device in the wireless communication system 1 (for example, terminal 10, base station 20, CN30, etc.) includes a processor 11, a storage device 12, a communication device 13 that performs wired or wireless communication, an input device that accepts various input operations, and an input / output device 14 that outputs various information.

[0100] The processor 11 is, for example, a CPU (Central Processing Unit) and controls each device in the wireless communication system 1. The processor 11 may perform various processes described in this embodiment by reading and executing a program from the storage device 12. Each device in the wireless communication system 1 may be composed of one or more processors 11. Each of these devices may also be called a computer.

[0101] The storage device 12 consists of, for example, memory, an HDD (Hard Disk Drive), and / or an SSD (Solid State Drive). The storage device 12 may store various information necessary for the execution of processing by the processor 11 (for example, programs executed by the processor 11).

[0102] The communication device 13 is a device that communicates via a wired and / or wireless network, and may include, for example, a network card, a communication module, a chip, an antenna, etc. The communication device 13 may also include an amplifier, an RF (Radio Frequency) device that processes wireless signals, and a BB (BaseBand) device that processes baseband signals.

[0103] The RF device generates a radio signal to be transmitted from antenna A by performing D / A conversion, modulation, frequency conversion, power amplification, etc., on the digital baseband signal received from the BB device. The RF device also generates a digital baseband signal by performing frequency conversion, demodulation, A / D conversion, etc., on the radio signal received from the antenna and transmits it to the BB device. The BB device performs processing to convert the digital baseband signal into packets and processing to convert the packets into digital baseband signals.

[0104] The input / output device 14 includes, for example, an input device such as a keyboard, touch panel, mouse, and / or microphone, and an output device such as a display and / or speaker.

[0105] The hardware configuration described above is merely an example. Each device within the wireless communication system 1 may omit some of the hardware shown in Figure 13, or may include hardware not shown in Figure 13. Furthermore, the hardware shown in Figure 13 may be comprised of one or more chips.

[0106] <Functional Block Configuration> ≪Device≫ Figure 14 shows an example of the functional block configuration of a terminal according to this embodiment. As shown in Figure 14, the terminal 10 comprises a receiving unit 101, a transmitting unit 102, and a control unit 103.

[0107] Furthermore, all or part of the functions realized by the receiving unit 101 and the transmitting unit 102 can be realized using the communication device 13. In addition, all or part of the functions realized by the receiving unit 101 and the transmitting unit 102, and the control unit 103 can be realized by the processor 11 executing a program stored in the storage device 12. The program can be stored in a storage medium. The storage medium on which the program is stored may be a non-transitory computer-readable medium. The non-transitory storage medium is not particularly limited, but may be a USB memory or a CD-ROM, for example.

[0108] The receiving unit 101 receives the downlink signal. The receiving unit 101 may also receive information and / or data transmitted via the downlink signal. Here, "receiving" may include performing reception-related processing such as receiving, demapping, demodulating, decoding, monitoring, and measuring at least one of the following: receiving, demapping, demodulating, decoding, monitoring, and measuring the radio signal. The downlink signal may include at least one of the following: PDSCH, PDCCH, downlink reference signal, synchronization signal, PBCH, etc.

[0109] The receiver 101 monitors PDCCH candidates in the search space and detects DCI. The receiver 101 may also receive downlink user data and / or upper-layer control information (e.g., Medium Access Control Element (MAC CE), Radio Resource Control (RRC) messages, etc.) via PDSCH scheduled using DCI.

[0110] Specifically, the receiving unit 101 may receive system information (for example, SIB1, SIB2, or SIB4).

[0111] Furthermore, the receiving unit 101 provides Q for terminals 10 with a specific number of antennas in a specific cell (e.g., single Rx terminals and / or 2Rx terminals). rxlevmin (Minimum reception level) information regarding the minimum reception level (for example, Q rxlevmin,SingleRx Information and / or Q rxlevmin,TwoRx Information), and / or Q for terminals with a specific number of antennas in that particular cell. qualmin (Minimum quality level) information regarding the minimum quality level (e.g., Q qualmin,SingleRx Information and / or Q qualmin,TwoRx Information may be received (for example, Figures 6-8).

[0112] Furthermore, the receiving unit 101 receives Q in a specific cell. rxlevmin (Minimum reception level) information regarding the minimum reception level (for example, Q rxlevmin Information), and / or Q in a specific cell qualmin (Minimum quality level) information regarding the minimum quality level (e.g., Q qualmin Information may be received (for example, Figures 6-8, 10-12).

[0113] Furthermore, the receiving unit 101 is Q rxlevmin Q is the offset for a terminal 10 with a specific number of antennas (e.g., single Rx terminal and / or 2Rx terminal) relative to . rxlevminoffset,Rx Information about (for example, Q) rxlevminoffset,SingleRx Information and / or Q rxlevminoffset,TwoRx Information), and / or Q qualmin Q is the offset for terminal 10 with respect to that specific number of antennas. qualminoffset,Rx Information about (for example, Q) qualminoffset,SingleRx Information and / or Q qualminoffset,TwoRx Information may be received (for example, Figures 10-12).

[0114] The transmitter 102 transmits an uplink signal. The transmitter 102 may also transmit information and / or data transmitted via the uplink signal. Here, “transmit” may include performing transmission-related processing such as encoding, modulation, mapping, and transmitting a radio signal. The uplink signal may include at least one of the following: an uplink shared channel (e.g., a Physical Uplink Shared channel: PUSCH), a random access preamble (e.g., a Physical Random Access Channel: PRACH), an uplink reference signal, etc.

[0115] The transmitting unit 102 may transmit uplink user data and / or upper-layer control information (e.g., MAC CE, RRC messages, etc.) via a PUSCH scheduled using the DCI received by the receiving unit 101.

[0116] The control unit 103 performs various controls on the terminal 10. Specifically, the control unit 103 controls access by a specific type of terminal 10 (e.g., a RedCap terminal) and / or a terminal 10 with a specific number of antennas (e.g., a single Rx terminal and / or a 2Rx terminal) to a specific cell. The control unit 103 also controls cell selection / re-selection for the said specific type of terminal 10 and / or the said terminal 10 with a specific number of antennas.

[0117] Furthermore, the control unit 103 may determine whether or not access to a particular cell is prohibited based on first access information relating to access by a particular type of terminal 10 (e.g., RedCap access information) and / or second access information relating to access by a terminal 10 with a particular number of antennas (e.g., single Rx access information and / or 2Rx access information).

[0118] Furthermore, the control unit 103 may determine whether access to a particular cell is prohibited based on whether the system information received by the receiving unit 101 includes the first access information (e.g., RedCap access information) and / or whether the system information includes the second access information (e.g., single Rx access information and / or 2Rx access information) (for example, Figure 3).

[0119] Furthermore, the control unit 103 may determine whether access to a particular cell is prohibited based on whether the terminal 10 is a specific type of terminal 10 (e.g., a RedCap terminal) and / or whether the terminal 10 is a terminal 10 with a specific number of antennas (e.g., a single Rx terminal and / or a 2Rx terminal) (for example, Figure 3).

[0120] Furthermore, the control unit 103 may determine that if terminal 10 is a specific type of terminal 10 (for example, a RedCap terminal) and the system information does not include the first access information (for example, RedCap access information), then access by terminal 10 to a specific cell is prohibited (for example, Figure 3).

[0121] Furthermore, if terminal 10 is a specific type of terminal 10 (e.g., a RedCap terminal) and the system information includes the first access information (e.g., RedCap access information), the control unit 103 may determine whether access to a specific cell is prohibited based on whether terminal 10 is a terminal 10 with a specific number of antennas (e.g., a single Rx access terminal or a 2Rx terminal) and whether the system information includes the second access information (e.g., single Rx access information) (for example, Figure 3).

[0122] For example, the control unit 103 may determine that terminal 10 is prohibited from accessing a specific cell if terminal 10 is a RedCap terminal, RedCap access information is included in the system information, terminal 10 is a single Rx access terminal, and single Rx access information is not included in the system information (for example, Figure 3). On the other hand, if terminal 10 is a single Rx access terminal and single Rx access information is included in the system information, the control unit 103 may evaluate a specific cell based on predetermined criteria and camp on the specific cell based on the evaluation result.

[0123] Furthermore, the control unit 103 provides minimum reception level information (for example, Q) for terminal 10 with a specific number of antennas. rxlevmin,SingleRx Information or Q rxlevmin,TwoRx Srxlev (receive level parameter) derived based on the information, and / or minimum quality level information for a terminal 10 with a specific number of antennas (e.g., Q qualmin,SingleRx Information or Q qualmin,TwoRx Based on the Squal (quality level parameter) derived from the information, cell selection and / or cell re-selection are controlled (e.g., Figure 5).

[0124] Furthermore, if the terminal 10 is a terminal 10 with a specific number of antennas (for example, a single Rx terminal or a 2Rx terminal), the control unit 103 will provide the minimum reception level information for the terminal 10 with the specific number of antennas (for example, Q rxlevmin,SingleRx Information or Q rxlevmin,TwoRx Based on the information, Srxlev is derived, and / or the lowest quality level information (e.g., Q) for the terminal 10 with the specified number of antennas. qualmin,SingleRx Information or Q qualmin,TwoRx The Squal may be derived based on the information (for example, Figure 5). In this way, the control unit 103 may derive Srxlev and / or Squal based on whether or not it is a terminal 10 with a specific number of antennas.

[0125] Furthermore, if the control unit 103 is permitted to allow access by a specific type of terminal 10 (e.g., a RedCap terminal) to a specific cell, and / or is permitted to allow access by a terminal 10 with a specific number of antennas in that specific cell (e.g., a single Rx terminal or a 2Rx terminal), it will provide the minimum reception level information (e.g., Q) for the terminal 10 with the specific number of antennas. rxlevmin,SingleRx Information or Q rxlevmin,TwoRx Based on the information, Srxlev is derived, and / or the lowest quality level information (e.g., Q) for the terminal 10 with the specified number of antennas. qualmin,SingleRx Information or Q qualmin,TwoRx The Squal may be derived based on the information (for example, Figure 5).

[0126] Furthermore, the control unit 103 is Q rxlevmin Q derived from the information rxlevmin Q rxlevmin Q is the offset for terminal 10 with a specific number of antennas relative to the given number of antennas. rxlevminoffset,Rx Srxlev, and / or Q, are derived based on the above. qualmin Q derived from the information qualmin Q qualmin Q is the offset for terminal 10 with a specific number of antennas relative to the given number of antennas. qualminoffset,Rx Cell selection and / or cell re-selection may be controlled based on the Squal derived from the above (for example, Figure 9).

[0127] Q rxlevminoffset,Rx and / or Q qualminoffset,Rx Q may be a predetermined value. Alternatively, the control unit 103 may set Q rxlevminoffset,Rx Report based on the information. qualminoffset,Rx Derive Q qualminoffset,Rx Report based on the information. qualminoffset,Rx You may derive this.

[0128] ≪Base station≫ Figure 15 shows an example of the functional block configuration of a base station according to this embodiment. As shown in Figure 15, the base station 20 comprises a receiving unit 201, a transmitting unit 202, and a control unit 203.

[0129] Furthermore, all or part of the functions realized by the receiving unit 201 and the transmitting unit 202 can be realized using the communication device 13. In addition, all or part of the functions realized by the receiving unit 201 and the transmitting unit 202, and the control unit 203 can be realized by the processor 11 executing a program stored in the storage device 12. The program can be stored in a storage medium. The storage medium on which the program is stored may be a computer-readable non-temporary storage medium. The non-temporary storage medium is not particularly limited, but may be a storage medium such as a USB memory or CD-ROM.

[0130] The receiving unit 201 receives the above-mentioned uplink signal. The receiving unit 201 may also receive information and / or data transmitted via the above-mentioned uplink signal.

[0131] The transmitter 202 transmits the downlink signal. The transmitter 202 may also transmit information and / or data transmitted via the downlink signal. Specifically, the transmitter 202 may transmit system information (e.g., SIB1, SIB2, or SIB4). The transmitter 202 may also transmit minimum reception level information (e.g., Q) for terminal 10 with a specific number of antennas. rxlevmin,SingleRx Information and / or Q rxlevmin,TwoRx Information) and minimum quality level information (e.g., Q qualmin,SingleRx Information and / or Q qualmin,TwoRx Information may be transmitted (for example, Figures 6-8). Also, the transmitting unit 202 transmits the above Q rxlevmin Information and / or Q qualmin Information may be transmitted (for example, Figures 6-8, 10-12). Also, the transmitting unit 202 transmits the above Q rxlevminoffset,Rx Information and / or Q qualminoffset,Rx You may send information (for example, Figures 10-12).

[0132] The control unit 203 performs various controls at the base station 20. The control unit 203 controls access of a specific type of terminal 10 and / or a terminal 10 with a specific number of antennas to a specific cell. The control unit 203 also controls cell selection / re-selection for a specific type of terminal 10 and / or a terminal 10 with a specific number of antennas.

[0133] (Other embodiments) The various signals, information, and parameters in the above embodiment may be signaled at any layer. That is, the various signals, information, and parameters may be replaced by signals, information, and parameters of any layer, such as a higher layer (e.g., Non Access Stratum (NAS) layer, RRC layer, MAC layer, etc.) or a lower layer (e.g., physical layer). Furthermore, notification of predetermined information is not limited to explicit notification, but may also be done implicitly (e.g., by not notifying the information or by using other information).

[0134] Furthermore, the names of the various signals, information, parameters, IE, channels, time units, and frequency units in the above embodiments are merely illustrative and may be replaced with other names. For example, a slot may have any name as long as it is a time unit having a predetermined number of symbols. Similarly, a RB may have any name as long as it is a frequency unit having a predetermined number of subcarriers.

[0135] Furthermore, the applications of terminal 10 in the above embodiment (e.g., RedCap, IoT, etc.) are not limited to those exemplified, and it may be used for any application (e.g., eMBB, URLLC, Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.) as long as it has similar functionality. Also, the format of various information is not limited to the above embodiment, and may be changed as appropriate, such as bit representation (0 or 1), boolean value (true or false), integer value, character, etc. Also, singular and plural in the above embodiment may be interchangeable.

[0136] The embodiments described above are for facilitating the understanding of the present disclosure and are not for limiting and interpreting the present disclosure. The flowcharts, sequences, each element included in the embodiments, and their arrangements, indexes, conditions, etc. described in the embodiments are not limited to those exemplified and can be changed as appropriate. Also, at least a part of the configurations described in the above embodiments can be partially replaced or combined.

[0137] In addition, in FIG. 5, when the terminal 10 is a single Rx terminal, the Qrxlevmin, SingleRx information is included in SIB1, SIB2, and SIB4, and both the RedCap access information and the single Rx access information in SIB1 indicate access permission for a specific cell (for example, set to true), Qrxlevmin is derived based on the Qrxlevmin, SingleRx information (for example, "q-RxLevMinSingleRx"), but it is not limited thereto. When it is determined that the terminal 10 is permitted to access the cell based on the RedCap access information and / or the single Rx access information in SIB1 (that is, the cell is not prohibited for the terminal 10), Qrxlevmin may be derived based on the Qrxlevmin, SingleRx information (for example, "q-RxLevMinSingleRx").

[0138] Also, in FIG. 5, when the terminal 10 is a single Rx terminal, the Q qualmin,SingleRx information is included in SIB1, SIB2, and SIB4, and both the RedCap access information and the single Rx access information in SIB1 indicate access permission for a specific cell (for example, set to true), Q qualmin is derived based on the Q qualmin,SingleRx information (for example, "q-QualMinSingleRx"), but it is not limited thereto. When it is determined that the terminal 10 is permitted to access the cell based on the RedCap access information and / or the single Rx access information in SIB1 (that is, the cell is not prohibited for the terminal 10), Qqualmin Q qualmin,SingleRx It may be derived based on information (for example, "q-QualMinSingleRx").

Claims

1. Upon receiving System Information Block 1 (SIB1), A receiving unit that receives a system information block 2 (SIB2) containing information regarding intra-frequency cell reselection, The system includes information indicating whether a cell is prohibited for a terminal having a specific number of receivers included in the SIB1, and a control unit that determines whether a cell is prohibited based on whether the terminal is a terminal having the specific number of receivers. The control unit performs intra-frequency cell reselection based on a reception level value derived from information indicating the minimum reception level for the intra-frequency cell reselection included in the SIB2 and a value for a terminal with a specific number of receivers for the minimum reception level for the intra-frequency cell reselection. The value for the minimum reception level related to the intra-frequency cell reselection for a terminal with a specific number of receivers is a predetermined value for a terminal with a single receiver. Terminal.

2. The receiving unit receives the SIB2 which includes information indicating the minimum quality level for intra-frequency cell reselection, The control unit performs the cell reselection based on a quality value derived from information indicating the minimum quality level for the intra-frequency cell reselection included in the SIB2 and a value for a terminal with a specific number of receivers for the minimum quality level for the intra-frequency cell reselection. The value for the minimum quality level for the intra-frequency cell reselection for a terminal with a specific number of receivers is a predetermined value for a terminal with a single receiver. The terminal according to claim 1.

3. The receiving unit receives a system information block 4 (SIB4) containing information regarding inter-frequency cell reselection. The control unit performs interfrequency cell reselection based on a reception level value derived from information indicating the minimum reception level for the interfrequency cell reselection included in the SIB4 and a value for a terminal with a specific number of receivers for the minimum reception level for the interfrequency cell reselection. The value for the minimum reception level related to the interfrequency cell reselection for a terminal with a specific number of receivers is a predetermined value for a terminal with a single receiver. The terminal according to claim 1 or 2.

4. The receiving unit receives a system information block 4 (SIB4) which includes information indicating the minimum quality level for inter-frequency cell reselection. The control unit performs the cell reselection based on a quality value derived from information indicating the minimum quality level for the inter-frequency cell reselection included in the SIB4 and a value for a terminal with a specific number of receivers for the minimum quality level for the inter-frequency cell reselection. The value for the minimum quality level for the inter-frequency cell reselection for a terminal with a specific number of receivers is a predetermined value for a terminal with a single receiver. The terminal according to any one of claims 1 to 3.

5. The terminal equipped with the aforementioned specific number of receivers is a RedCap (Reduced Capability) terminal. The terminal according to any one of claims 1 to 4.

6. System information block 1 (SIB1) is transmitted. A transmitting unit that transmits a system information block 2 (SIB2) containing information regarding intra-frequency cell reselection, The system includes information indicating whether a cell is prohibited for a terminal having a specific number of receivers included in the SIB1, and a control unit that determines whether a cell is prohibited for a terminal having a specific number of receivers based on whether the terminal is a terminal having a specific number of receivers. The control unit controls intra-frequency cell reselection based on a reception level value derived from information indicating the minimum reception level for the intra-frequency cell reselection included in the SIB2 and a value for a terminal with a specific number of receivers for the minimum reception level for the intra-frequency cell reselection. The value for the minimum reception level related to the intra-frequency cell reselection for a terminal with a specific number of receivers is a predetermined value for a terminal with a single receiver. Base station.

7. The transmitting unit transmits the SIB2 which includes information indicating the minimum quality level for intra-frequency cell reselection. The control unit controls the cell reselection based on a quality value derived from information indicating the minimum quality level for the intra-frequency cell reselection included in the SIB2 and a value for a terminal with a specific number of receivers for the minimum quality level for the intra-frequency cell reselection. The value for the minimum quality level for the intra-frequency cell reselection for a terminal with a specific number of receivers is a predetermined value for a terminal with a single receiver. The base station according to claim 6.

8. The transmitting unit transmits a system information block 4 (SIB4) containing information regarding inter-frequency cell reselection. The control unit controls inter-frequency cell reselection based on a reception level value derived from information indicating the minimum reception level for the inter-frequency cell reselection included in the SIB4 and a value for a terminal with a specific number of receivers for the minimum reception level for the inter-frequency cell reselection. The value for the minimum reception level related to the interfrequency cell reselection for a terminal with a specific number of receivers is a predetermined value for a terminal with a single receiver. The base station according to claim 6 or 7.

9. The transmitting unit transmits a system information block 4 (SIB4) which includes information indicating the minimum quality level for inter-frequency cell reselection. The control unit controls the cell reselection based on a quality value derived from information indicating the minimum quality level for the inter-frequency cell reselection included in the SIB4 and a value for a terminal with a specific number of receivers for the minimum quality level for the inter-frequency cell reselection. The value for the minimum quality level for the inter-frequency cell reselection for a terminal with a specific number of receivers is a predetermined value for a terminal with a single receiver. A base station according to any one of claims 6 to 8.

10. The terminal equipped with the aforementioned specific number of receivers is a RedCap (Reduced Capability) terminal. A base station according to any one of claims 6 to 9.

11. Upon receiving System Information Block 1 (SIB1), The process includes receiving a system information block 2 (SIB2) containing information regarding intra-frequency cell reselection, Information indicating whether a cell is prohibited for a terminal having a specific number of receivers included in the SIB1, and a step of determining whether a cell is prohibited based on whether the terminal is a terminal having the specific number of receivers. The process includes: performing intra-frequency cell reselection based on a reception level value derived from information indicating the minimum reception level for intra-frequency cell reselection included in the SIB2, and a value for a terminal equipped with a specific number of receivers for the minimum reception level for intra-frequency cell reselection; The value for the minimum reception level related to the intra-frequency cell reselection for a terminal with a specific number of receivers is a predetermined value for a terminal with a single receiver. The wireless communication method used by the terminal.

12. The receiving step involves receiving the SIB2 which includes information indicating the minimum quality level for intra-frequency cell reselection, The step to be performed involves performing the cell reselection based on a quality value derived from information indicating the minimum quality level for the intra-frequency cell reselection included in the SIB2 and a value for a terminal having a specific number of receivers for the minimum quality level for the intra-frequency cell reselection, The value for the minimum quality level for the intra-frequency cell reselection for a terminal with a specific number of receivers is a predetermined value for a terminal with a single receiver. The wireless communication method according to claim 11.

13. The receiving step involves receiving a system information block 4 (SIB4) containing information regarding inter-frequency cell reselection. The step to be performed involves performing inter-frequency cell reselection based on a reception level value derived from information indicating the minimum reception level for inter-frequency cell reselection included in the SIB4 and a value for a terminal with a specific number of receivers for the minimum reception level for inter-frequency cell reselection, The value for the minimum reception level related to the interfrequency cell reselection for a terminal with a specific number of receivers is a predetermined value for a terminal with a single receiver. The wireless communication method according to claim 11 or 12.

14. The receiving step involves receiving a system information block 4 (SIB4) which contains information indicating the minimum quality level for inter-frequency cell reselection. The step to be performed involves performing cell reselection based on a quality value derived from information indicating the minimum quality level for inter-frequency cell reselection included in the SIB4 and a value for a terminal with a specific number of receivers for the minimum quality level for inter-frequency cell reselection, The value for the minimum quality level for the inter-frequency cell reselection for a terminal with a specific number of receivers is a predetermined value for a terminal with a single receiver. The wireless communication method according to any one of claims 11 to 13.

15. The terminal equipped with the aforementioned specific number of receivers is a RedCap (Reduced Capability) terminal. A wireless communication method according to any one of claims 11 to 14.

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