Terminal device, base station device, and communication method

Abstract

This terminal device receives a master information block including an RRC parameter indicating indices of a first table over a physical broadcast channel, where the number of symbols in a control resource set of a first search space set and the number of repeated transmissions in a physical downlink control channel transmitted via the first search space set correspond to the indices of the first table, and monitors the physical downlink control channel via the first search space set on the basis of the number of symbols and the number of repeated transmissions corresponding to the indices indicated by the RRC parameter.

Description

[Technical Field]

[0001] The present invention relates to a terminal device, a base station device, and a communication method. This application claims priority to Japanese Patent Application No. 2020-128886, filed on July 30, 2020, the contents of which are incorporated herein by reference. [Background technology]

[0002] Currently, the Third Generation Partnership Project (3GPP) is conducting technical studies and formulating standards for LTE (Long Term Evolution)-Advanced Pro and NR (New Radio technology) as radio access methods and radio network technologies for fifth-generation cellular systems (Non-Patent Document 1).

[0003] For the fifth-generation cellular system, three expected service scenarios are required: eMBB (enhanced Mobile BroadBand) that realizes high-speed and large-capacity transmission, URLLC (Ultra-Reliable and Low Latency Communication) that realizes low-latency and highly reliable communication, and mMTC (massive Machine Type Communication) that connects a large number of machine-type devices such as IoT (Internet of Things). Furthermore, for Release 17, a future release of NR, studies are being conducted on reduced capability (REDCAP) NR devices that do not require the high requirements of eMBB and URLLC but aim to reduce costs and extend battery life, assuming applications such as sensor networks, surveillance cameras, and / or wearable devices (Non-Patent Document 2). [Prior art documents] [Non-patent literature]

[0004] [Non-Patent Document 1] RP-161214, NTT DOCOMO, “Revision of SI: Study on New Radio Access Technology”, June 2016 [Non-patent document 2] RP-193238, Ericsson, “New SID on support of reduced capability NR devices”, December 2019 Summary of the Invention [Problem to be solved by the invention]

[0005] An object of the present invention is to provide a terminal device, a base station device, and a communication method that enable efficient communication in the above-mentioned wireless communication system. [Means for solving the problem]

[0006] (1) In order to achieve the above object, an aspect of the present invention employs the following means: That is, a terminal device according to one aspect of the present invention includes a receiving unit that receives, via a physical broadcast channel, a master information block including an RRC parameter indicating an index of a first table, wherein each index of the first table corresponds to the number of symbols of a control resource set of a first search space set and the number of repeated transmissions of a physical downlink control channel transmitted in the first search space set, and includes a processing unit that monitors the physical downlink control channel in the first search space set based on the number of symbols and the number of repeated transmissions corresponding to the index indicated by the RRC parameter.

[0007] (2) In addition, a base station device in one embodiment of the present invention includes a processing unit that generates a master information block including an RRC parameter indicating an index of a first table, and a transmitting unit that transmits the master information block on a physical broadcast channel, wherein each index of the first table corresponds to the number of symbols of a control resource set of a first search space set and the number of repeated transmissions of a physical downlink control channel transmitted in the first search space set, and the transmitting unit transmits the physical downlink control channel in the first search space set based on the number of symbols and the number of repeated transmissions corresponding to the index indicated by the RRC parameter.

[0008] (3) Also, a communication method according to one aspect of the present invention is a communication method for a terminal device, which receives a master information block including an RRC parameter indicating an index of a first table on a physical broadcast channel, and each index of the first table corresponds to the number of symbols of a control resource set of a first search space set and the number of repeated transmissions of a physical downlink control channel transmitted in the first search space set, and monitors the physical downlink control channel in the first search space set based on the number of symbols and the number of repeated transmissions corresponding to the index indicated by the RRC parameter.

[0009] (4) Also, a communication method according to one aspect of the present invention is a communication method of a base station device, which generates a master information block including an RRC parameter indicating an index of a first table, transmits the master information block on a physical broadcast channel, and each index of the first table corresponds to the number of symbols of a control resource set of a first search space set and the number of repetitions of a physical downlink control channel transmitted in the first search space set, and transmits the physical downlink control channel in the first search space set based on the number of symbols and the number of repetitions corresponding to the index indicated by the RRC parameter. [Effects of the Invention]

[0010] According to one aspect of the present invention, a terminal device and a base station device can communicate efficiently. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a diagram illustrating the concept of a wireless communication system according to an embodiment of the present invention. [Figure 2] FIG. 2 is a diagram illustrating an example of a schematic configuration of uplink and downlink slots according to an embodiment of the present invention. [Figure 3] FIG. 2 is a diagram illustrating the relationship between subframes, slots, and minislots in the time domain according to an embodiment of the present invention. [Figure 4] FIG. 10 is a diagram showing an example of the configuration of an RRC parameter PDCCH-ConfigSIB1-RC, which is information indicating settings related to a PDCCH for a REDCAP SIB1 according to an embodiment of the present invention. [Figure 5] FIG. 10 is a diagram illustrating an example of a table to which the value of controlResourceSetZero is applied as an index according to an embodiment of the present invention. [Figure 6] FIG. 10 is a diagram illustrating an example of a table to which the value of searchSpaceZero is applied as an index according to an embodiment of the present invention. [Figure 7] 10 is a diagram showing an example of a table of indexes indicated by a 2-bit parameter pdcch-repetitions in a REDCAP MIB according to an embodiment of the present invention and the number of repetitive transmissions of PDCCH. FIG. [Figure 8] A figure showing an example of an SS / PBCH block and SS burst set for an embodiment of the present invention. [Figure 9] FIG. 2 illustrates an example of a REDCAP PBCH block and a half-frame in which one or more REDCAP PBCH blocks are transmitted, according to an embodiment of the present invention. [Figure 10] FIG. 2 is a diagram illustrating an example of a first scrambling process of a PBCH according to an embodiment of the present invention. [Figure 11] 10A and 10B are diagrams illustrating examples of parameters used in the first scrambling process of the PBCH and the third scrambling process of the REDCAP PBCH according to an embodiment of the present invention. [Figure 12] A diagram showing resources in which PSS, SSS, PBCH, and DMRS for PBCH are arranged within an SS / PBCH block according to an embodiment of the present invention. [Figure 13] FIG. 10 is a diagram illustrating an example of a third scrambling process for a REDCAP PBCH according to an embodiment of the present invention. [Figure 14] 3 illustrates an example of a REDCAP PBCH block and a half-frame in which one or more REDCAP PBCH blocks are transmitted according to an embodiment of the present invention. [Figure 15] 10 is a diagram showing resources in which a REDCAP PBCH and a DMRS for the REDCAP PBCH are arranged within a REDCAP PBCH block according to an embodiment of the present invention. FIG. [Figure 16] FIG. 2 is a diagram illustrating an example of a REDCAP PBCH block according to an embodiment of the present invention. [Figure 17] FIG. 10 is a diagram illustrating another example of a REDCAP PBCH block according to an embodiment of the present invention. [Figure 18] FIG. 1 is a diagram illustrating an example of beamforming according to an embodiment of the present invention. [Figure 19] 1 is a schematic block diagram showing a configuration of a terminal device 1 according to an embodiment of the present invention. [Figure 20] 1 is a schematic block diagram showing a configuration of a base station device 3 according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, an embodiment of the present invention will be described.

[0013] Fig. 1 is a conceptual diagram of a wireless communication system in this embodiment. In Fig. 1, the wireless communication system includes a terminal device 1A, a terminal device 1B, and a base station device 3. Hereinafter, the terminal device 1A and the terminal device 1B are also referred to as terminal devices 1.

[0014] The terminal device 1 is also referred to as a user terminal, a mobile station device, a communication terminal, a mobile device, a terminal, a UE (User Equipment), or an MS (Mobile Station). The base station device 3 is also referred to as a radio base station device, a base station, a radio base station, a fixed station, a Node B (NB), an evolved Node B (eNB), a BTS (Base Transceiver Station), a BS (Base Station), an NR Node B (NR NB), an NNB, a TRP (Transmission and Reception Point), or a gNB. The base station device 3 may include a core network device. The base station device 3 may also include one or more transmission reception points 4. At least some of the functions / processing of the base station device 3 described below may be functions / processing of each transmission reception point 4 included in the base station device 3. The base station device 3 may serve the terminal device 1 with a communication coverage area (communication area) controlled by the base station device 3 as one or more cells. Furthermore, the base station device 3 may serve the terminal device 1 as one or more cells, each of which is a communication range (communication area) controlled by one or more transmission / reception points 4. Furthermore, the base station device 3 may divide one cell into multiple partial areas (beamed areas) and serve the terminal device 1 in each partial area. Here, the partial area may be identified based on the index of the beam used in beamforming or the index of precoding.

[0015] In this embodiment, the wireless communication link from the base station device 3 to the terminal device 1 is called a downlink. In this embodiment, the wireless communication link from the terminal device 1 to the base station device 3 is called an uplink.

[0016] In FIG. 1, wireless communication between the terminal device 1 and the base station device 3 may use Orthogonal Frequency Division Multiplexing (OFDM) including a Cyclic Prefix (CP), Single-Carrier Frequency Division Multiplexing (SC-FDM), Discrete Fourier Transform Spread OFDM (DFT-S-OFDM), or Multi-Carrier Code Division Multiplexing (MC-CDM).

[0017] Also, in FIG. 1, the wireless communication between the terminal device 1 and the base station device 3 may use Universal-Filtered Multi-Carrier (UFMC), Filtered OFDM (F-OFDM), Windowed OFDM (Windowed OFDM), or Filter-Bank Multi-Carrier (FBMC).

[0018] In this embodiment, OFDM is used as a transmission method and OFDM symbols are used, but the use of the other transmission methods described above is also included in one aspect of the present invention.

[0019] 1, the above-described transmission method may be used in which a CP is not used or zero padding is used instead of a CP in wireless communication between the terminal device 1 and the base station device 3. Furthermore, a CP or zero padding may be added to both the front and rear ends.

[0020] An aspect of this embodiment may be operated in carrier aggregation or dual connectivity with a radio access technology (RAT) such as LTE or LTE-A / LTE-A Pro. In this case, it may be used in some or all of the cells or cell groups, carriers, or carrier groups (e.g., a primary cell (PCell), a secondary cell (SCell), a primary secondary cell (PSCell), a master cell group (MCG), a secondary cell group (SCG), etc.). Also, an aspect of this embodiment may be used in standalone operation. In dual connectivity operation, a special cell (SpCell) is referred to as a PCell of an MCG or a PSCell of an SCG depending on whether the medium access control (MAC) entity is associated with an MCG or an SCG, respectively. When not in dual connectivity operation, the special cell (SpCell) is referred to as a PCell. The special cell (SpCell) supports PUCCH transmission and contention-based random access.

[0021] In this embodiment, one or more serving cells may be configured for the terminal device 1. The configured multiple serving cells may include one primary cell and one or more secondary cells. The primary cell may be the serving cell where an initial connection establishment procedure is performed, the serving cell where a connection re-establishment procedure is initiated, or the cell designated as the primary cell in the handover procedure. One or more secondary cells may be configured at the time when an RRC (Radio Resource Control) connection is established or afterwards. However, the configured multiple serving cells may include one primary secondary cell. The primary secondary cell may be a secondary cell capable of transmitting control information in the uplink, among one or more secondary cells configured for the terminal device 1. Furthermore, two types of subsets of serving cells, a master cell group and a secondary cell group, may be configured for the terminal device 1. The master cell group may be configured with one primary cell and zero or more secondary cells. The secondary cell group may be configured with one primary secondary cell and zero or more secondary cells.

[0022] The wireless communication system of this embodiment may employ TDD (Time Division Duplex) and / or FDD (Frequency Division Duplex). The TDD (Time Division Duplex) method or the FDD (Frequency Division Duplex) method may be applied to all of a plurality of cells. Furthermore, cells employing the TDD method and cells employing the FDD method may be aggregated. The TDD method may be referred to as unpaired spectrum operation. The FDD method may be referred to as paired spectrum operation.

[0023] In the following, a subframe will be described. In this embodiment, the subframe will be referred to as a subframe, but the subframe according to this embodiment may also be referred to as a resource unit, a radio frame, a time period, a time interval, etc.

[0024] FIG. 2 is a diagram illustrating an example of a schematic configuration of uplink and downlink slots according to the first embodiment of the present invention. Each radio frame is 10 ms long. Each radio frame is composed of 10 subframes and W slots. One slot is composed of X OFDM symbols. That is, the length of one subframe is 1 ms. The time length of each slot is defined by the subcarrier spacing. For example, when the subcarrier spacing of the OFDM symbol is 15 kHz and NCP (Normal Cyclic Prefix) is used, X=7 or X=14, which are 0.5 ms and 1 ms, respectively. When the subcarrier spacing is 60 kHz, X=7 or X=14, which are 0.125 ms and 0.25 ms, respectively. When X=14, for example, when the subcarrier spacing is 15 kHz, W=10, and when the subcarrier spacing is 60 kHz, W=40. FIG. 2 illustrates the case of X=7 as an example. Note that the example in FIG. 2 can be similarly extended to the case of X=14. Also, uplink slots may be defined similarly, and downlink slots and uplink slots may be defined separately. Also, the cell bandwidth in FIG. 2 may be defined as a part of a band (BWP: Bandwidth Part). Also, a slot may be defined as a transmission time interval (TTI). A slot does not have to be defined as a TTI. A TTI may be the transmission period of a transport block.

[0025] The signals or physical channels transmitted in each slot may be represented by a resource grid. The resource grid is defined by a number of subcarriers and a number of OFDM symbols for each numerology (subcarrier spacing and cyclic prefix length) and each carrier. The number of subcarriers constituting one slot depends on the downlink and uplink bandwidths of the cell, respectively. Each element in the resource grid is called a resource element. A resource element may be identified by a subcarrier number and an OFDM symbol number.

[0026] A resource grid is used to represent the mapping of resource elements of a physical downlink channel (such as a PDSCH) or uplink channel (such as a PUSCH). For example, when the subcarrier spacing is 15 kHz and the number of OFDM symbols included in a subframe is 14, in the case of NCP, one physical resource block is defined by 14 consecutive OFDM symbols in the time domain and 12*Nmax consecutive subcarriers in the frequency domain. Nmax is the maximum number of resource blocks (RBs) determined by the subcarrier spacing setting μ, which will be described later. In other words, the resource grid consists of (14*12*Nmax, μ) resource elements. In the case of ECP (Extended CP), only a subcarrier spacing of 60 kHz is supported, so one physical resource block is defined by, for example, 12 (the number of OFDM symbols included in one slot) * 4 (the number of slots included in one subframe) = 48 consecutive OFDM symbols in the time domain and 12*Nmax, μ consecutive subcarriers in the frequency domain. That is, the resource grid consists of (48*12*Nmax, μ) resource elements.

[0027] Resource blocks (RBs) are defined as reference resource blocks, common resource blocks, physical resource blocks, and virtual resource blocks. One resource block is defined as 12 consecutive subcarriers in the frequency domain. The reference resource block is common to all subcarriers, and may be numbered in ascending order, for example, at a subcarrier spacing of 15 kHz. Subcarrier index 0 in reference resource block index 0 may be referred to as reference point A (or simply referred to as the "reference point"). Common resource blocks are resource blocks numbered in ascending order from 0 at each subcarrier spacing setting μ from reference point A. The resource grid described above is defined by these common resource blocks. Physical resource blocks are resource blocks numbered in ascending order from 0 within a band part (BWP), which will be described later. Physical resource blocks are resource blocks numbered in ascending order from 0 within a band part (BWP). A physical uplink channel is first mapped to a virtual resource block. Then, the virtual resource block is mapped to a physical resource block. Hereinafter, a resource block may be a virtual resource block, a physical resource block, a common resource block, or a reference resource block.

[0028] Next, we will explain the subcarrier spacing setting μ. As mentioned above, NR supports one or more OFDM numerologies. For a given BWP, the subcarrier spacing setting μ (μ = 0, 1, ..., 5) and cyclic prefix length are specified by higher layers for the downlink BWP and for the uplink BWP. Here, when μ is given, the subcarrier spacing Δf is given by Δf = 2^μ·15 (kHz).

[0029] For subcarrier spacing μ, slots are numbered from 0 to N^{subframe,μ}_{slot}-1 in ascending order within a subframe, and from 0 to N^{frame,μ}_{slot}-1 in ascending order within a frame. Based on the slot configuration and cyclic prefix, N^{slot}_{symb} consecutive OFDM symbols are in a slot, where N^{slot}_{symb} is 14. The start of slot n^{μ}_{s} in a subframe is aligned in time with the start of the n^{μ}_{s}*N^{slot}_{symb}th OFDM symbol in the same subframe.

[0030] Next, subframes, slots, and minislots will be described. Figure 3 shows an example of the relationship between subframes, slots, and minislots in the time domain. As shown in the figure, three types of time units are defined. A subframe is 1 ms regardless of the subcarrier spacing, the number of OFDM symbols included in a slot is 7 or 14 (however, if the cyclic prefix (CP) added to each symbol is Extended CP, it may be 6 or 12), and the slot length varies depending on the subcarrier spacing. Here, if the subcarrier spacing is 15 kHz, one subframe includes 14 OFDM symbols. A downlink slot may be referred to as PDSCH mapping type A. An uplink slot may be referred to as PUSCH mapping type A.

[0031] A minislot (which may also be called a subslot) is a time unit consisting of fewer OFDM symbols than the number of OFDM symbols included in one slot. The figure shows an example in which a minislot consists of two OFDM symbols. The OFDM symbols within a minislot may coincide with the OFDM symbol timing that constitutes the slot. The smallest unit of scheduling may be a slot or a minislot. Allocating a minislot may also be referred to as non-slot-based scheduling. Scheduling a minislot may also be expressed as scheduling a resource in which the relative time positions of the start positions of the reference signal and data are fixed. Downlink minislots may be referred to as PDSCH mapping type B. Uplink minislots may be referred to as PUSCH mapping type B.

[0032] In the terminal device 1, the transmission direction (uplink, downlink, or flexible) of the symbols in each slot is set in a higher layer using an RRC message including predetermined higher layer parameters received from the base station device 3, or is set by a PDCCH of a specific DCI format (e.g., DCI format 2_0) received from the base station device 3. In this embodiment, a slot format that sets the direction of each symbol in a slot to either uplink, downlink, or flexible is called a slot format. One slot format may include downlink symbols, uplink symbols, and flexible symbols.

[0033] In the downlink of this embodiment, a carrier corresponding to a serving cell is referred to as a downlink component carrier (or downlink carrier). In the uplink of this embodiment, a carrier corresponding to a serving cell is referred to as an uplink component carrier (or uplink carrier). In the sidelink of this embodiment, a carrier corresponding to a serving cell is referred to as a sidelink component carrier (or sidelink carrier). Downlink component carriers, uplink component carriers, and / or sidelink component carriers are collectively referred to as component carriers (or carriers).

[0034] The physical channels and physical signals of this embodiment will be described.

[0035] In FIG. 1, the following physical channels are used in wireless communication between the terminal device 1 and the base station device 3.

[0036] PBCH (Physical Broadcast CHannel) REDCAP PBCH (REDuction CAPability Physical Broadcast CHannel) PDCCH (Physical Downlink Control CHannel) PDSCH (Physical Downlink Shared CHannel) PUCCH (Physical Uplink Control CHannel) PUSCH (Physical Uplink Shared CHannel) PRACH (Physical Random Access CHannel)

[0037] The PBCH is used to broadcast an important information block (MIB: Master Information Block, EIB: Essential Information Block, BCH: Broadcast Channel) including important system information required by the terminal device 1. The MIB may include information for identifying the number (SFN: System Frame Number) of the radio frame (also referred to as a system frame) to which the PBCH is mapped, information for identifying the subcarrier spacing of the system information block 1 (SIB1), information indicating the frequency domain offset between the resource block grid and the SS / PBCH block (also referred to as a synchronization signal block, SS block, or SSB), and information indicating the PDCCH configuration for the SIB1. However, the SIB1 includes information required to evaluate whether the terminal device 1 is allowed to connect to the cell, and includes information for determining the scheduling of other system information (SIB: System Information Block). Here, the information indicating the PDCCH configuration for SIB1 may be information determining a CORESET (Control Resource Set)0 (also referred to as a common CORESET), a common search space (CSS), and / or necessary PDCCH parameters. Here, CORESET indicates a resource element of the PDCCH, and is composed of one or more resource blocks in the frequency domain and one or more symbols in the time domain. CORESET0 is a CORESET for the PDCCH that schedules SIB1. Here, the search space may be a set of PDCCH candidates to be monitored. For example, the search space may be a range in which blind decoding of DCI is performed. A search space that differs for each terminal device 1 may be called a UE-specific search space (USS), and a search space common to multiple terminal devices 1 or a cell may be called a common search space.

[0038] The PBCH may also be used to broadcast information for identifying the number (SFN: System Frame Number) of the radio frame (also called a system frame) to which the PBCH is mapped and / or information for identifying a half radio frame (HRF: Half Frame) (also called a half frame). Note that a half radio frame is a time frame with a length of 5 ms, and the information for identifying a half radio frame may be information for identifying whether it is the first 5 ms or the last 5 ms of a 10 ms radio frame.

[0039] Furthermore, the PBCH may be used to broadcast a time index within a period of the SS / PBCH block. Here, the time index is information indicating the index of a synchronization signal and a PBCH within a cell. The time index may also be referred to as an SSB index or an SS / PBCH block index. For example, when transmitting SS / PBCH blocks using a quasi-co-location (QCL) assumption regarding multiple transmit beams, transmit filter settings, and / or receive spatial parameters, the time index may indicate a time order within a predetermined period or a set period. Furthermore, the terminal device may recognize differences in the time index as differences in the QCL assumption regarding the transmit beams, transmit filter settings, and / or receive spatial parameters.

[0040] The REDCAP PBCH is used to broadcast a REDCAP important information block (REDCAP MIB, REDCAP EIB, REDCAP BCH) containing important system information required by the terminal device 1. However, some or all of the information included in the REDCAP MIB may be the same as some or all of the information included in the MIB broadcast on the PBCH. However, the REDCAP MIB may be received by a terminal device 1 that satisfies specific conditions (for example, indicates specific parameters such as UE Capability and / or UE Category). However, the REDCAP PBCH and / or REDCAP MIB according to one embodiment of the present invention may be a PBCH and / or MIB received by a terminal device 1 that satisfies specific conditions. For example, the PBCH and / or MIB received by a terminal device 1 according to one embodiment of the present invention may be a REDCAP PBCH and / or REDCAP MIB. However, the REDCAP MIB may include information for identifying the SFN to which the REDCAP PBCH is mapped or information for identifying the SFN to which the SS / PBCH block corresponding to the REDCAP PBCH is mapped, information for identifying the subcarrier spacing of REDCAP SIB1, information indicating the frequency domain offset between the resource block grid and the SS / PBCH block (also referred to as synchronization signal block, SS block, or SSB), and information indicating the settings for the PDCCH for REDCAP SIB1.

[0041] The REDCAP SIB1 includes information required to evaluate whether the terminal device 1 is permitted to connect to a cell, and includes information for determining the scheduling of other REDCAP SIBs. However, the REDCAP SIB1 may include information required to evaluate whether the terminal device 1 that satisfies a specific condition (for example, indicates specific parameters such as UE Capability and / or UE Category) is permitted to connect to a cell, and may include information for determining the scheduling of other REDCAP SIBs. For example, the above-mentioned REDCAP SIB1 may be SIB1. However, the REDCAP PBCH may broadcast a MIB. For example, the REDCAP MIB included in the information transmitted on the REDCAP PBCH may be the same as the MIB included in the information transmitted on the PBCH included in the SS / PBCH block to which the REDCAP PBCH is associated.

[0042] Furthermore, the information transmitted on the REDCAP PBCH may include information specifying the number of a radio frame to which the REDCAP PBCH is mapped and / or information specifying a half radio frame, whereby the information transmitted on the REDCAP PBCH may include information specifying the number of a radio frame to which a PSS and / or SSS associated with the REDCAP PBCH is mapped and / or information specifying a half radio frame, whereby the information transmitted on the REDCAP PBCH may include information specifying the number of a radio frame to which an associated SS / PBCH block is mapped and / or information specifying a half radio frame.

[0043] Furthermore, the information transmitted on the REDCAP PBCH may include a time index within the period of the associated SS / PBCH block. The time index may also be referred to as an SSB index or an SS / PBCH block index. For example, when the base station device 3 transmits SS / PBCH blocks using QCL assumptions regarding multiple transmit beams, transmit filter settings, and / or receive spatial parameters, the time index may indicate the time order within a predetermined period or a set period. Furthermore, the terminal device 1 may recognize differences in the time index as differences in QCL assumptions regarding the transmit beams, transmit filter settings, and / or receive spatial parameters. Furthermore, the information transmitted on the REDCAP PBCH may include a time index of the REDCAP PBCH.

[0044] The information indicating the configuration regarding the PDCCH for REDCAP SIB1 transmitted on the REDCAP PBCH may be information determining CORESET0, a common search space, and / or required PDCCH parameters for the PDCCH scheduling REDCAP SIB1, however, the information regarding CORESET0, the common search space, and / or the information determining the required PDCCH parameters indicated in the REDCAP MIB may be the same as the information regarding CORESET0, the common search space, and / or the information determining the required PDCCH parameters indicated in the MIB.

[0045] 4 shows an example of the configuration of the RRC parameter PDCCH-ConfigSIB1-RC, which is information indicating the settings related to the PDCCH for REDCAP SIB1. The RRC parameter PDCCH-ConfigSIB1-RC is composed of the parameter controlResourceSetZero used to set CORESET0 and the parameter searchSpaceZero used to set the common search space. The information element (IE) ControlResourceSetZero indicated by controlResourceSetZero is set to a value between 0 and 15. However, the number of values ​​that can be set to ControlResourceSetZero may be other than 16, for example, 32. The information element SearchSpaceZero indicated by searchSpaceZero is set to a value between 0 and 15. However, the number of values ​​that can be set to SearchSpaceZero may be other than 16, for example, 32.

[0046] The terminal device 1 determines the number of consecutive resource blocks and the number of consecutive symbols for CORESET (which may be CORESET0) of the Type0-PDCCH common search space set (CSS set) from controlResourceSetZero in PDCCH-ConfigSIB1-RC. The value indicated by controlResourceSetZero is applied as an index to a predetermined table. The terminal device 1 may also determine the table to be applied based on the supported UE category and / or UE capability. The terminal device 1 may also determine the table to be applied based on the minimum channel bandwidth. The terminal device 1 may also determine the table to be applied based on the subcarrier spacing of the SS / PBCH block, the subcarrier spacing of the REDCAP PBCH, and / or the subcarrier spacing of CORESET0. Figure 5 shows an example of a table to which the value of controlResourceSetZero is applied as an index. 5, each row of the table to which the value of controlResourceSetZero is applied as an index may indicate an index indicated by controlResourceSetZero, a multiplexing pattern of REDCAP PBCH and CORESET, the number of RBs of CORESET in the Type0-PDCCH common search space set, the number of symbols of CORESET in the Type0-PDCCH common search space set, an offset, and / or the number of repetitions of PDCCH transmitted in the Type0-PDCCH common search space set. Each index indicated by controlResourceSetZero may be associated with a multiplexing pattern of REDCAP PBCH and CORESET, the number of RBs of CORESET in the Type0-PDCCH common search space set, the number of symbols of CORESET in the Type0-PDCCH common search space set, an offset, and / or the number of repetitions of PDCCH transmitted in the Type0-PDCCH common search space set by the table.

[0047] The multiplexing pattern of REDCAP PBCH and CORESET indicates the pattern of the relationship between the frequency / time position of the REDCAP PBCH where the REDCAP MIB is detected and the corresponding CORESET0. For example, when the multiplexing pattern of REDCAP PBCH and CORESET is 1, the REDCAP PBCH and CORESET are time-multiplexed into different symbols. However, the multiplexing pattern of REDCAP PBCH and CORESET may also indicate the pattern of the relationship between the SS / PBCH block corresponding to the REDCAP PBCH where the REDCAP MIB is detected and the frequency / time position of CORESET0. However, the multiplexing pattern of REDCAP PBCH and CORESET is not defined in a table and may always be a fixed pattern (e.g., pattern 1).

[0048] The number of RBs in CORESET of the Type0-PDCCH common search space set indicates the number of resource blocks consecutively allocated to CORESET (which may be CORESET0) of the Type0-PDCCH common search space set. The number of symbols in CORESET of the Type0-PDCCH common search space set indicates the number of symbols consecutively allocated to CORESET (which may be CORESET0) of the Type0-PDCCH common search space set.

[0049] The offset indicates the offset from the smallest RB index of the resource blocks allocated to CORESET0 to the smallest RB index of the common resource block that overlaps with the first resource block of the corresponding REDCAP PBCH. However, the offset may also indicate the offset from the smallest RB index of the resource blocks allocated to CORESET0 to the smallest RB index of the common resource block that overlaps with the first resource block of the SS / PBCH block that corresponds to the REDCAP PBCH.

[0050] The number of repetitions of the PDCCH transmitted in the Type0-PDCCH common search space set may be the number of repetitions of the PDCCH that schedules the PDSCH carrying the REDCAP SIB1. If the number of repetitions of the PDCCH indicated in the table is greater than 1, the terminal device 1 considers that the PDCCH transmitted in the Type0-PDCCH common search space set is being repeatedly transmitted.

[0051] Repeated transmission of the PDCCH may be transmitting the PDCCH of the same DCI multiple times using a predetermined symbol pattern. For example, the base station device 3 may transmit the PDCCH of the same DCI multiple times using consecutive symbols in one or more search space sets. The terminal device 1 may receive the PDCCH of the same DCI multiple times using consecutive symbols in one or more search space sets.

[0052] The terminal device 1 receives one or more PDCCHs repeatedly transmitted in the Type 0-PDCCH common search space set, and receives a PDSCH carrying a SIB1 (which may be a REDCAP SIB1) scheduled in the one or more PDCCHs.

[0053] The terminal device 1 receives a REDCAP MIB including the RRC parameter controlResourceSetZero on the REDCAP PBCH, and monitors the PDCCH that schedules the PDSCH carrying the REDCAP SIB1 based on the controlResourceSetZero and a table indicating the index, the multiplexing pattern of the REDCAP PBCH and CORESET, the number of RBs of the CORESET in the Type0-PDCCH common search space set, the number of symbols of the CORESET in the Type0-PDCCH common search space set, the offset and / or the number of repeated transmissions of the PDCCH transmitted in the Type0-PDCCH common search space set.

[0054] The terminal device 1 determines a PDCCH monitoring opportunity from searchSpaceZero in PDCCH-ConfigSIB1-RC. However, the value indicated by searchSpaceZero is applied as an index to a predetermined table. However, the terminal device 1 may determine the table to be applied based on the supported UE category and / or UE capability. However, the terminal device 1 may determine the table to be applied based on the frequency range. However, the terminal device 1 may determine the table to be applied based on the multiplexing pattern of REDCAP PBCH and CORESET. Figure 6 shows an example of a table to which the value of searchSpaceZero is applied as an index.

[0055] The terminal device 1 monitors the PDCCH in the Type 0-PDCCH common search space set (Type 0-PDCCH CSS set) for two consecutive slots starting from slot n0. The terminal device 1 determines n0 and the system frame number based on the parameters O and M shown in the table for the REDCAP PBCH with index i and / or the corresponding SS / PBCH block.

[0056] However, if a field in the REDCAP MIB indicates that a REDCAP SIB1 is absent, the information indicating the configuration regarding the PDCCH for the REDCAP SIB1 transmitted on the REDCAP PBCH may indicate the frequency location where the terminal device 1 finds the REDCAP PBCH with the REDCAP SIB1 and / or the corresponding SS / PBCH block or the frequency range where the network does not provide the REDCAP PBCH with the REDCAP SIB1 and / or the corresponding SS / PBCH block.

[0057] However, the number of repetitions of the PDCCH transmitted in the Type 0-PDCCH common search space set may be associated with part of other bit information transmitted in the REDCAP PBCH.

[0058] Furthermore, the information transmitted via the REDCAP PBCH may include a field pdcch-repetitions indicating the number of repetitions of the PDCCH transmitted via the Type0-PDCCH common search space set. However, the number of repetitions of the PDCCH transmitted via the Type0-PDCCH common search space set may be the number of repetitions of the PDCCH that schedules the PDSCH carrying the REDCAP SIB1. For example, the number of repetitions of the PDCCH may be indicated by two bits in the REDCAP MIB. Figure 7 shows an example of a table of indexes indicated by the two-bit parameter pdcch-repetitions in the REDCAP MIB and the number of repetitions of the PDCCH transmitted via the Type0-PDCCH common search space set. In the table of Figure 7, indexes 0, 1, 2, and 3 indicated in the REDCAP MIB correspond to N / A, 1, 2, and 4 as the number of repetitions of the PDCCH, respectively. However, a value of N / A for the number of repetitions of the PDCCH may indicate that the PDCCH and / or the REDCCAP SIB1 that schedules the PDSCH carrying the REDCAP SIB1 are not transmitted. In this case, the terminal device 1 considers that the PDCCH and / or the REDCCAP SIB1 that schedules the REDCAP SIB1 are not transmitted when the index indicated by 2 bits in the REDCAP MIB is 0. However, a value of N / A for the number of repetitions of the PDCCH may indicate that the cell is barred.

[0059] The terminal device 1 receives a REDCAP MIB including the RRC parameter pdcch-repetitions via a REDCAP PBCH, determines the number of times to repeatedly transmit a PDCCH that schedules a PDSCH carrying a REDCAP SIB1 based on the pdcch-repetitions, and if the pdcch-repetitions is a predetermined value, considers that the PDCCH that schedules a PDSCH carrying a REDCAP SIB1 is not being transmitted.

[0060] The PDCCH is used to transmit (or carry) downlink control information (DCI) in downlink wireless communication (wireless communication from the base station device 3 to the terminal device 1). Here, one or more DCIs (which may be referred to as DCI formats) are defined for transmitting the downlink control information. That is, a field for the downlink control information is defined as DCI and mapped to information bits. The PDCCH is transmitted in PDCCH candidates. The terminal device 1 monitors a set of PDCCH candidates in a serving cell. Here, monitoring may mean attempting to decode the PDCCH according to a certain DCI format. The terminal device 1 monitors a set of PDCCH candidates in one or more CORESETs of an active DL BWP of an activated serving cell. The set of PDCCH candidates monitored by the terminal device 1 is defined by a PDCCH search space set (SS set). One search space set is a common search space set (CSS set) or a UE-specific search space set (USS set). The terminal device 1 monitors PDCCH candidates in one or more search space sets. However, monitoring PDCCH candidates may also mean monitoring the PDCCH. The PDCCH candidates may be monitored in a Type0-PDCCH common search space set (Type0-PDCCH CSS set) set by RRC parameters included in the MIB, RRC parameters included in the REDCAP MIB, or arbitrary RRC parameters.

[0061] For example, the following DCI formats may be defined: DCI Format 0_0 DCI Format 0_1 DCI Format 0_2 DCI Format 1_0 DCI Format 1_1 DCI Format 1_2 DCI Format 2_0 DCI Format 2_1 DCI Format 2_2 DCI Format 2_3

[0062] DCI format 0_0 may be used for scheduling the PUSCH in a serving cell. DCI format 0_0 may include information indicating PUSCH scheduling information (frequency domain resource allocation and time domain resource allocation). DCI format 0_0 may be added with a Cyclic Redundancy Check (CRC) scrambled by any of the Radio Network Temporary Identifiers (RNTIs), which are identifiers, namely, Cell-RNTI (C-RNTI), Configured Scheduling (CS)-RNTI, MCS-C-RNTI, and / or Temporary C-RNTI (TC-RNTI). DCI format 0_0 may be monitored in a common search space or a UE-specific search space.

[0063] DCI format 0_1 ​​may be used for scheduling a PUSCH in a serving cell. DCI format 0_1 ​​may include information indicating PUSCH scheduling information (frequency domain resource allocation and time domain resource allocation), information indicating a bandwidth part (BWP), a Channel State Information (CSI) request, a Sounding Reference Signal (SRS) request, and / or information regarding an antenna port. DCI format 0_1 ​​may be supplemented with a CRC scrambled by any of the C-RNTI, CS-RNTI, Semi Persistent (SP)-CSI-RNTI, and / or MCS-C-RNTI among RNTIs. DCI format 0_1 ​​may be monitored in a UE-specific search space.

[0064] DCI format 0_2 may be used for scheduling the PUSCH in a serving cell. DCI format 0_2 may include information indicating PUSCH scheduling information (frequency domain resource allocation and time domain resource allocation), information indicating BWP, a CSI request, an SRS request, and / or information regarding an antenna port. DCI format 0_2 may be supplemented with a CRC scrambled by any of the C-RNTI, CSI-RNTI, SP-CSI-RNTI, and / or MCS-C-RNTI among the RNTIs. DCI format 0_2 may be monitored in a UE-specific search space. DCI format 0_2 may also be referred to as DCI format 0_1A, etc.

[0065] DCI format 1_0 may be used for scheduling a PDSCH in a serving cell. DCI format 1_0 may include information indicating PDSCH scheduling information (frequency domain resource allocation and time domain resource allocation). DCI format 1_0 may be added with a CRC scrambled by any of the following identifiers: C-RNTI, CS-RNTI, MCS-C-RNTI, Paging RNTI (P-RNTI), System Information (SI)-RNTI, Random Access (RA)-RNTI, and / or TC-RNTI. DCI format 1_0 may be monitored in a common search space or a UE-specific search space.

[0066] DCI format 1_1 may be used for scheduling a PDSCH in a serving cell. DCI format 1_1 may include information indicating PDSCH scheduling information (frequency domain resource allocation and time domain resource allocation), information indicating a band portion (BWP), a transmission configuration indication (TCI), and / or information related to an antenna port. DCI format 1_1 may be added with a CRC scrambled by any one of C-RNTI, CS-RNTI, and / or MCS-C-RNTI among RNTIs. DCI format 1_1 may be monitored in a UE-specific search space.

[0067] DCI format 1_2 may be used for scheduling a PDSCH in a serving cell. DCI format 1_2 may include information indicating PDSCH scheduling information (frequency domain resource allocation and time domain resource allocation), information indicating a BWP, a TCI, and / or information related to an antenna port. DCI format 1_2 may be added with a CRC scrambled by any one of C-RNTI, CS-RNTI, and / or MCS-C-RNTI among RNTIs. DCI format 1_2 may be monitored in a UE-specific search space. DCI format 1_2 may be referred to as DCI format 1_1A, etc.

[0068] DCI format 2_0 is used to indicate the slot format of one or more slots. A slot format is defined as each OFDM symbol in a slot being classified as downlink, flexible, or uplink. For example, if the slot format is 28, DDDDDDDDDDDDFU is applied to the 14 OFDM symbols in a slot for which slot format 28 is specified. Here, D is the downlink symbol, F is the flexible symbol, and U is the uplink symbol. Slots will be described later.

[0069] DCI format 2_1 is used to notify the terminal device 1 of physical resource blocks (PRBs or RBs) and OFDM symbols for which no transmission may be assumed. This information may be called a preemption instruction (discontinuous transmission instruction).

[0070] DCI format 2_2 is used for transmitting PUSCH and transmit power control (TPC) commands for the PUSCH.

[0071] DCI format 2_3 is used to transmit a group of TPC commands for sounding reference signal (SRS) transmission by one or more terminal devices 1. An SRS request may also be transmitted together with the TPC command. DCI format 2_3 may also define an SRS request and a TPC command for an uplink without a PUSCH and a PUCCH, or for an uplink in which SRS transmission power control is not linked to PUSCH transmission power control.

[0072] DCI for downlink is also referred to as a downlink grant or a downlink assignment. Here, DCI for uplink is also referred to as an uplink grant or an uplink assignment. DCI may also be referred to as a DCI format.

[0073] The CRC parity bits added to the DCI format transmitted in one PDCCH are scrambled with the SI-RNTI, P-RNTI, C-RNTI, CS-RNTI, RA-RNTI, or TC-RNTI. The SI-RNTI may be an identifier used for broadcasting system information. The P-RNTI may be an identifier used for paging and notifying of system information changes. The C-RNTI, MCS-C-RNTI, and CS-RNTI are identifiers for identifying a terminal device within a cell. The TC-RNTI is an identifier for identifying a terminal device 1 that transmitted a random access preamble during a contention-based random access procedure.

[0074] The C-RNTI is used to control the PDSCH or PUSCH in one or more slots. The CS-RNTI is used to periodically allocate resources for the PDSCH or PUSCH. The MCS-C-RNTI is used to indicate the use of a predetermined MCS table for grant-based transmission. The TC-RNTI is used to control the PDSCH or PUSCH transmission in one or more slots. The TC-RNTI is used to schedule retransmissions of the random access message 3 and the transmission of the random access message 4. The RA-RNTI is determined according to the frequency and time location information of the physical random access channel that transmitted the random access preamble.

[0075] Different values ​​may be used for the C-RNTI and / or other RNTIs depending on the type of traffic of the PDSCH or PUSCH. Different values ​​may be used for the C-RNTI and other RNTIs depending on the service type (eMBB, URLLC, and / or mMTC) of data transmitted on the PDSCH or PUSCH. The base station device 3 may use different values ​​of RNTI depending on the service type of data to be transmitted. The terminal device 1 may identify the service type of data transmitted on the associated PDSCH or PUSCH based on the value of the RNTI applied to the received DCI (used for scrambling).

[0076] The PUCCH is used to transmit uplink control information (UCI) in uplink wireless communication (wireless communication from the terminal device 1 to the base station device 3). Here, the uplink control information may include channel state information (CSI) used to indicate the state of a downlink channel. The uplink control information may also include a scheduling request (SR) used to request UL-SCH resources. The uplink control information may also include a hybrid automatic repeat request ACKnowledgement (HARQ-ACK). The HARQ-ACK may indicate a HARQ-ACK for downlink data (Transport block, Medium Access Control Protocol Data Unit: MAC PDU, Downlink-Shared Channel: DL-SCH).

[0077] The PDSCH is used to transmit downlink data (DL-SCH: Downlink Shared CHannel) from the Medium Access Control (MAC) layer, and is also used to transmit system information (SI) and random access responses (RAR) in the downlink.

[0078] The PUSCH may be used to transmit uplink data from the MAC layer (UL-SCH: Uplink Shared CHannel) or uplink data together with HARQ-ACK and / or CSI. Alternatively, the PUSCH may be used to transmit only CSI or only HARQ-ACK and CSI. That is, the PUSCH may be used to transmit only UCI.

[0079] Here, the base station device 3 and the terminal device 1 exchange (transmit and receive) signals in a higher layer. For example, the base station device 3 and the terminal device 1 may transmit and receive an RRC message (also referred to as an RRC message, RRC information, or RRC signaling) in a Radio Resource Control (RRC) layer. Furthermore, the base station device 3 and the terminal device 1 may transmit and receive a MAC control element in a Medium Access Control (MAC) layer. Furthermore, the RRC layer of the terminal device 1 acquires system information broadcast from the base station device 3. Here, the RRC message, the system information, and / or the MAC control element are also referred to as a higher layer signal (higher layer signaling) or a higher layer parameter (higher layer parameter). Each of the parameters included in the higher layer signal received by the terminal device 1 may be referred to as a higher layer parameter. Here, the upper layer refers to an upper layer seen from the physical layer, and may include one or more of a MAC layer, an RRC layer, an RLC layer, a PDCP layer, a NAS (Non Access Stratum) layer, etc. For example, in MAC layer processing, the upper layer may include one or more of an RRC layer, an RLC layer, a PDCP layer, a NAS (Non Access Stratum) layer, etc. Hereinafter, the meaning of "A is given (provided) by an upper layer" or "A is given (provided) by an upper layer" may mean that an upper layer (mainly an RRC layer or a MAC layer) of the terminal device 1 receives A from the base station device 3, and the received A is given (provided) to the physical layer of the terminal device 1 from the upper layer of the terminal device 1. For example, in the terminal device 1, "upper layer parameters are provided" may mean that an upper layer signal is received from the base station device 3, and the upper layer parameters included in the received upper layer signal are provided to the physical layer of the terminal device 1 from the upper layer of the terminal device 1. Setting upper layer parameters in the terminal device 1 may mean that the upper layer parameters are given (provided) to the terminal device 1.For example, setting upper layer parameters in the terminal device 1 may mean that the terminal device 1 receives an upper layer signal from the base station device 3 and sets the received upper layer parameters in the upper layer. However, setting upper layer parameters in the terminal device 1 may also include setting default parameters that are given in advance in the upper layer of the terminal device 1.

[0080] The PDSCH or PUSCH may be used to transmit RRC signaling and MAC control elements. The RRC signaling transmitted from the base station apparatus 3 by the PDSCH may be common signaling for multiple terminal apparatuses 1 in a cell. Furthermore, the RRC signaling transmitted from the base station apparatus 3 may be signaling dedicated to a certain terminal apparatus 1 (also referred to as dedicated signaling). In other words, terminal apparatus-specific (UE-specific) information may be transmitted using signaling dedicated to a certain terminal apparatus 1. Furthermore, the PUSCH may be used to transmit UE capabilities in the uplink.

[0081] In Figure 1, the following downlink physical signals are used in downlink wireless communication: Here, the downlink physical signals are not used to transmit information output from higher layers, but are used by the physical layer. ·Synchronization signal (SS) ·Reference Signal (RS)

[0082] The synchronization signal may include a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). The PSS and SSS may be used to detect the cell ID.

[0083] The synchronization signal is used by the terminal device 1 to synchronize the frequency domain and the time domain of the downlink. Here, the synchronization signal may be used by the terminal device 1 for precoding or beam selection in precoding or beamforming by the base station device 3. Note that the beam may also be referred to as a transmit or receive filter setting, or a spatial domain transmit filter or a spatial domain receive filter.

[0084] The reference signal is used by the terminal device 1 to perform propagation path compensation of the physical channel. Here, the reference signal may also be used by the terminal device 1 to calculate downlink CSI. Furthermore, the reference signal may be used for fine synchronization to the extent that numerology such as radio parameters and subcarrier spacing, window synchronization of FFT, etc., can be achieved.

[0085] In this embodiment, one or more of the following downlink reference signals are used. ·DMRS(Demodulation Reference Signal) ·CSI-RS(Channel State Information Reference Signal) ·PTRS(Phase Tracking Reference Signal) ·TRS(Tracking Reference Signal)

[0086] The DMRS is used to demodulate modulated signals. Two types of DMRS may be defined: a reference signal for demodulating the PBCH and a reference signal for demodulating the PDSCH, or both may be referred to as DMRS. The CSI-RS is used for measuring channel state information (CSI) and beam management, and applies periodic, semi-persistent, or aperiodic CSI reference signal transmission methods. The CSI-RS may be defined as a non-zero power (NZP) CSI-RS and a zero power (ZP) CSI-RS with zero transmission power (or zero reception power). Here, the ZP CSI-RS may be defined as a CSI-RS resource with zero transmission power or no transmission. The PTRS is used to track the phase on the time axis in order to compensate for frequency offsets caused by phase noise. The TRS is used to compensate for Doppler shifts during high-speed movement. Note that the TRS may be used as one configuration of the CSI-RS. For example, the radio resources may be configured as a TRS for one-port CSI-RS.

[0087] In this embodiment, one or more of the following uplink reference signals are used. ·DMRS(Demodulation Reference Signal) ·PTRS(Phase Tracking Reference Signal) ·SRS(Sounding Reference Signal)

[0088] The DMRS is used to demodulate modulated signals. Two types of DMRS may be defined: a reference signal for demodulating the PUCCH and a reference signal for demodulating the PUSCH. Both may be referred to as DMRS. The SRS is used for measuring uplink channel state information (CSI), channel sounding, and beam management. The PTRS is used to track the phase on the time axis to compensate for frequency offsets caused by phase noise.

[0089] In this embodiment, downlink physical channels and / or downlink physical signals are collectively referred to as downlink signals. In this embodiment, uplink physical channels and / or uplink physical signals are collectively referred to as uplink signals. In this embodiment, downlink physical channels and / or uplink physical channels are collectively referred to as physical channels. In this embodiment, downlink physical signals and / or uplink physical signals are collectively referred to as physical signals.

[0090] The BCH, UL-SCH, and DL-SCH are transport channels. A channel used in the Medium Access Control (MAC) layer is called a transport channel. The unit of the transport channel used in the MAC layer is also called a transport block (TB) and / or a MAC Protocol Data Unit (PDU). In the MAC layer, HARQ (Hybrid Automatic Repeat reQuest) control is performed for each transport block. A transport block is a unit of data that the MAC layer delivers to the physical layer. In the physical layer, a transport block is mapped to a codeword, and encoding processing is performed for each codeword.

[0091] 8 is a diagram showing an example of an SS / PBCH block (also referred to as a synchronization signal block, SS block, or SSB) according to this embodiment and a half frame (which may also be referred to as an SS burst set) in which one or more SS / PBCH blocks are transmitted. Fig. 8 shows an example in which two SS / PBCH blocks are included in an SS burst set that exists at a fixed period (which may also be referred to as an SSB period), and the SS / PBCH block is composed of four consecutive OFDM symbols.

[0092] The SS / PBCH block may be a block including a synchronization signal (PSS, SSS), a PBCH, and a DMRS for the PBCH. However, the SS / PBCH block may also be a block including a synchronization signal (PSS, SSS), a REDCAP PBCH, and a DMRS for the REDCAP PBCH. Transmitting a signal / channel included in an SS / PBCH block is expressed as transmitting an SS / PBCH block. When transmitting a synchronization signal and / or a PBCH using one or more SS / PBCH blocks in an SS burst set, the base station device 3 may use an independent downlink transmission beam for each SS / PBCH block.

[0093] The base station device 3 according to this embodiment transmits the REDCAP PBCH and the DMRS for the REDCAP PBCH using time resources and / or frequency resources different from those of the SS / PBCH block. However, transmitting / receiving / processing the REDCAP PBCH according to this embodiment may also mean transmitting / receiving / processing the REDCAP PBCH and the DMRS for the REDCAP PBCH. A block including the REDCAP PBCH and the DMRS for the REDCAP PBCH may be referred to as a REDCAP PBCH block. However, transmitting a signal / channel included in a REDCAP PBCH block may also be expressed as transmitting a REDCAP PBCH block. When transmitting the REDCAP PBCH using one or more REDCAP PBCH blocks within a predetermined time interval (which may also be referred to as a REDCAP PBCH burst set), the base station device 3 may use an independent downlink transmit beam for each REDCAP PBCH block. However, the REDCAP PBCH block according to this embodiment may refer to the REDCAP PBCH and / or the DMRS for the REDCAP PBCH itself. For example, transmitting / receiving / processing a REDCAP PBCH block may mean transmitting / receiving / processing a REDCAP PBCH and / or a DMRS for the REDCAP PBCH. However, the DMRS for the REDCAP PBCH and / or the REDCAP PBCH according to this embodiment may refer to a DMRS for the REDCAP PBCH and / or the REDCAP PBCH transmitted in a location other than an SS / PBCH block. For example, the DMRS for the REDCAP PBCH and / or the REDCAP PBCH may refer to a DMRS for the REDCAP PBCH and / or the REDCAP PBCH transmitted in a time and / or frequency resource different from that of the SS / PBCH block transmitted periodically with an SSB period. However, the REDCAP PBCH block according to this embodiment may be an SS / PBCH block without a PSS and / or SSS.

[0094] In this embodiment, the REDCAP PBCH block and / or the REDCAP PBCH is associated with one SS / PBCH block transmitted in an SS burst set (Half frame with SS / PBCH block). The transport block transmitted in the REDCAP PBCH and the transport block transmitted in the PBCH in the corresponding SS / PBCH block may be the same.

[0095] 9 is a diagram showing an example of a REDCAP PBCH block according to this embodiment and a half frame (which may also be referred to as a REDCAP PBCH burst set) in which one or more REDCAP PBCH blocks are transmitted. Fig. 9 shows an example in which two REDCAP PBCH blocks are included in a REDCAP PBCH burst set that exists at a constant period (which may also be referred to as an SSB period), and the REDCAP PBCH block is configured with four consecutive OFDM symbols. In the REDCAP PBCH block, a REDCAP PBCH modulation symbol and a DMRS for the REDCAP PBCH are frequency-multiplexed in each OFDM symbol.

[0096] However, a block including a synchronization signal (PSS, SSS), a REDCAP PBCH, and a DMRS for the REDCAP PBCH may be defined as a separate block, distinct from an SS / PBCH block. For example, a block including a synchronization signal (PSS, SSS), a REDCAP PBCH, and a DMRS for the REDCAP PBCH may be referred to as a REDCAP SS / PBCH block, a REDCAP synchronization signal block, a REDCAP SS block, or a REDCAP SSB. However, the description of the REDCAP SS / PBCH block according to this embodiment may also apply to the REDCAP SS / PBCH block.

[0097] The generation of a payload to be transmitted on the PBCH according to this embodiment will be described.

[0098] The PBCH is primarily used to transmit information about a transport block including the MIB. The MIB is master information that includes the 6 most significant bits (MSBs) of the 10 bits that indicate the SFN over which the SS / PBCH block is transmitted, as well as the subcarrier spacing used for SIB1 and downlink signals in the initial access procedure. A 1-bit transport block containing the MIB is generated in a higher layer, and an additional 8-bit additional bit is added.

[0099] Bits 1 to 4 of the additional bit information transmitted on the PBCH indicate the 4 LSBs (Least Significant Bits) of the 10 bits indicating the SFN in which the SS / PBCH block is transmitted. Bit 5 of the additional bit information transmitted on the PBCH is a half-frame bit indicating whether the half-frame in which the SS / PBCH block is transmitted is the first or second half of the radio frame. Bits 6 to 8 of the additional bit information transmitted on the PBCH indicate part of the SSB index information if the maximum number of SS / PBCH blocks that can be placed in a half-frame is 64; otherwise, they are one bit indicating part of the subcarrier offset information for identifying the frequency position of the SS / PBCH block and a reserved bit.

[0100] The MIB and additional bit information of A bits (A=A1+8) are subjected to interleaver processing, and then the first scrambling processing is performed. However, the first scrambling processing is performed on the input a0 to a A For bit sequences of -1, a'0~a' A Output the bit sequence a' i =(a i +s i ) mod 2, where s iis generated as shown in Figure 10 based on the SFN at which the SS / PBCH block is transmitted. In Figure 10, c(i) is a predetermined pseudo-random sequence. In Figure 10, M is M=A-3 when the number of SS / PBCH blocks that can be allocated within a half frame is 4 or 8, and M=A-6 when the number of SS / PBCH blocks that can be allocated within a half frame is 64. In Figure 10, v is determined as shown in Figure 11 using the 3rd LSB and 2nd LSB of the SFN at which the SS / PBCH block is transmitted. According to the processing in Figure 11, the first scrambling processing is scrambling processing based on the SFN at which the SS / PBCH block is transmitted.

[0101] A-bit bit sequence a'0 to a' generated by the first scrambling process A After a CRC adding process is performed to add L parity bits to B, a first channel encoding process using polar encoding is performed on B=A+L bits to generate N coded bits.

[0102] The N coded bits are subjected to the first rate matching process to output an 864-bit sequence b(0) to b(863).

[0103] The output bit sequence b(0) to b(863) of the first rate matching process is subjected to a second scrambling process before being modulated. The output bit sequence of the second scrambling process is expressed as b'(i) = b(i) + c2(i + v2 * 864)) mod 2, where c2 is a predetermined pseudo-random sequence, and v2 is a value indicated by the 2 LSBs of the SSB index when the maximum number of SS / PBCH blocks that can be placed in a half frame is 4, and a value indicated by the 3 LSBs of the SSB index in all other cases.

[0104] The output bit sequence b'(0) to b'(863) of the second scrambling process is modulated by QPSK to generate 432 PBCH modulated symbols dPBCH(0) to dPBCH(431).

[0105] In Fig. 8, the PSS, SSS, PBCH, and DMRS for the PBCH are time / frequency multiplexed in one SS / PBCH block. Fig. 12 is a table showing resources in which the PSS, SSS, PBCH, and DMRS for the PBCH are allocated within the SS / PBCH block.

[0106] The PSS may be mapped to the first symbol in the SS / PBCH block (the OFDM symbol with OFDM symbol number 0 relative to the start symbol of the SS / PBCH block). The PSS sequence consists of 127 symbols and may be mapped to the 57th to 183rd subcarriers in the SS / PBCH block (subcarriers with subcarrier numbers 56 to 182 relative to the start subcarrier of the SS / PBCH block).

[0107] The SSS may be mapped to the third symbol in the SS / PBCH block (the OFDM symbol whose OFDM symbol number is 2 relative to the start symbol of the SS / PBCH block). The SSS sequence is composed of 127 symbols and may be mapped to the 57th to 183rd subcarriers in the SS / PBCH block (subcarriers whose subcarrier numbers are 56 to 182 relative to the start subcarrier of the SS / PBCH block).

[0108] The PBCH and DMRS may be mapped to the second, third, and fourth symbols in the SS / PBCH block (OFDM symbols with OFDM symbol numbers 1, 2, and 3 relative to the start symbol of the SS / PBCH block). The sequence of modulation symbols for the PBCH is M symbIt may be mapped to resources to which DMRS is not mapped, including the 1st to 240th subcarriers of the second and fourth symbols in the SS / PBCH block (subcarriers with subcarrier numbers 0 to 239 relative to the starting subcarrier of the SS / PBCH block), and the 1st to 48th subcarriers and the 184th to 240th subcarriers of the third symbol in the SS / PBCH block (subcarriers with subcarrier numbers 0 to 47 and 192 to 239 relative to the starting subcarrier of the SS / PBCH block). The DMRS symbol sequence is composed of 144 symbols, and may be mapped to every fourth subcarrier, such as the first to 240th subcarriers of the second and fourth symbols in the SS / PBCH block (subcarriers with subcarrier numbers 0 to 239 relative to the starting subcarrier of the SS / PBCH block), and the first to 48th subcarriers and the 184th to 240th subcarriers of the third symbol in the SS / PBCH block (subcarriers with subcarrier numbers 0 to 47 and 192 to 239 relative to the starting subcarrier of the SS / PBCH block). For example, of the 240 subcarriers, PBCH modulation symbols may be mapped to 180 of the subcarriers, and DMRS for the PBCH may be mapped to 60 of the subcarriers.

[0109] Different SSB indices may be assigned to different SS / PBCH blocks in an SS burst set. SS / PBCH blocks assigned a certain SSB index may be transmitted periodically by the base station device 3 based on the SSB period. For example, an SSB period for an SS / PBCH block to be used for initial access and an SSB period to be set for a connected (Connected or RRC_Connected) terminal device 1 may be defined. The SSB period to be set for a connected (Connected or RRC_Connected) terminal device 1 may be set by an RRC parameter. The SSB period to be set for a connected (Connected or RRC_Connected) terminal device 1 is a period of time-domain radio resources for potential transmission, and the base station device 3 may actually decide whether to transmit. The SSB period for an SS / PBCH block to be used for initial access may be predefined in a specification or the like. For example, the terminal device 1 performing initial access may consider the SSB period to be 20 milliseconds.

[0110] The time position of the SS burst set to which the SS / PBCH block is mapped may be determined based on information identifying the system frame number (SFN) and / or information identifying the half frame included in the PBCH. The terminal device 1 that receives the SS / PBCH block may determine the current system frame number and half frame based on the received SS / PBCH block.

[0111] An SSB index (which may be referred to as an SS / PBCH block index) is assigned to the SS / PBCH block according to its temporal position within the SS burst set. The terminal device 1 identifies the SSB index based on PBCH information and / or reference signal information included in the detected SS / PBCH block.

[0112] SS / PBCH blocks with the same relative time within each SS burst set in multiple SS burst sets may be assigned the same SSB index. SS / PBCH blocks with the same relative time within each SS burst set in multiple SS burst sets may be assumed to be QCL (or to have the same downlink transmit beam). Furthermore, antenna ports with SS / PBCH blocks with the same relative time within each SS burst set in multiple SS burst sets may be assumed to be QCL with respect to mean delay, Doppler shift, and spatial correlation.

[0113] Within a period of a certain SS burst set, SS / PBCH blocks assigned the same SSB index may be assumed to be QCLs with respect to average delay, average gain, Doppler spread, Doppler shift, and spatial correlation. A configuration corresponding to one or more SS / PBCH blocks (or reference signals) that are QCLs may be referred to as a QCL configuration.

[0114] The number of SS / PBCH blocks (which may also be referred to as the number of SS blocks or the number of SSBs) may be defined as, for example, the number of SS / PBCH blocks within an SS burst, an SS burst set, or an SS / PBCH block period. The number of SS / PBCH blocks may also indicate the number of beam groups for cell selection within an SS burst, an SS burst set, or an SS / PBCH block period. Here, a beam group may be defined as the number of different SS / PBCH blocks or different beams included within an SS burst, an SS burst set, or an SS / PBCH block period (SSB period).

[0115] The generation of the payload transmitted on the REDCAP PBCH according to this embodiment will be described.

[0116] The REDCAP PBCH is used to transmit transport block information including the REDCAP MIB, and eight additional bits of additional bit information are added.

[0117] The first to fourth bits of the additional bit information transmitted on the REDCAP PBCH may indicate the four least significant bits (LSBs) of the 10 bits indicating the SFN in which the corresponding SS / PBCH block is transmitted. The fifth bit of the additional bit information transmitted on the REDCAP PBCH may be a half-frame bit indicating whether the half-frame in which the corresponding SS / PBCH block is transmitted is the first or second half of the radio frame. The sixth to eighth bits of the additional bit information transmitted on the REDCAP PBCH may indicate part of the SSB index information if the maximum number of SS / PBCH blocks that can be allocated within a half-frame is 64, or may be one bit and a reserved bit indicating part of the subcarrier offset information for identifying the frequency position of the SS / PBCH block in other cases.

[0118] The REDCAP MIB and additional bit information of C bits (C=C1+8) are subjected to interleaver processing, and then the third scrambling processing is performed. However, the third scrambling processing is performed on the input d0 to d C For bit sequences of -1, d'0~d' C Output the bit sequence of d' i =(d i +s' i ) mod 2, where s' imay be generated as shown in FIG. 13 based on the SFN in which the SS / PBCH block corresponding to the REDCAP PBCH is transmitted. In FIG. 13, c(i) is a predetermined pseudo-random sequence. In FIG. 13, M is equal to C-3 when the number of SS / PBCH blocks that can be arranged in a half frame is 4 or 8, and M is equal to C-6 when the number of SS / PBCH blocks that can be arranged in a half frame is 64. In FIG. 13, v may be determined as shown in FIG. 11 using the 3rd LSB and 2nd LSB of the SFN in which the SS / PBCH block is transmitted. According to the processing in FIG. 11, the third scrambling processing may be a scrambling processing based on the SFN in which the SS / PBCH block corresponding to the REDCAP PBCH is transmitted. However, when the number of bits C of the REDCAP MIB and additional bits is C=A, the interleaver processing and the third scrambling processing applied to the REDCAP MIB and additional bit information may be the same as the interleaver processing and the first scrambling processing applied to the PBCH. However, in Figure 13, v may be determined as in Figure 11 using the 3rd LSB and 2nd LSB of the SFN on which REDCAP is transmitted, and the third scrambling process may be a scrambling process based on the SFN on which REDCAP PBCH is transmitted.

[0119] The C-bit bit sequence d'0 to d' generated by the third scrambling process A After a CRC assignment process is performed to assign L parity bits to D, a second channel encoding process using polar encoding is performed on D=C+L bits to generate N' coded bits. Note that the second channel encoding process may be the same as the first channel encoding process used to generate the PBCH payload. However, the second channel encoding process may be different from the first channel encoding process used to generate the PBCH payload.

[0120] The N' coded bits are subjected to a second rate matching process to output an E-bit sequence b(0) to b(E-1), where E is based on the number of REDCAP PBCH modulation symbols allocated to the REDCAP PBCH. For example, if 180 subcarriers x 3 OFDM symbols = 540 REDCAP PBCH modulation symbols are allocated to the REDCAP PBCH block and the modulation scheme is QPSK, E is 1080.

[0121] The output bit sequence b(0) to b(E-1) of the second rate matching process is subjected to a fourth scrambling process before being modulated. The output bit sequence of the second scrambling process is expressed as b'(i) = b(i) + c2(i + v2 * E) mod 2, where c2 is a predetermined pseudo-random sequence, and v2 is a value indicated by the 2 LSBs of the SSB index when the maximum number of SS / PBCH blocks that can be placed in a half frame is 4, and a value indicated by the 3 LSBs of the SSB index in all other cases.

[0122] The output bit sequence b'(0) to b'(E-1) of the fourth scrambling process is modulated by QPSK to generate PBCH modulated symbols dPBCH(0) to dPBCH(E / 2-1) of E / 2 symbols.

[0123] The REDCAP PBCH according to this embodiment is transmitted in an OFDM symbol associated with the corresponding SS / PBCH block or the corresponding synchronization signal (PSS / SSS).

[0124] The time position relationship between the REDCAP PBCH and the corresponding SS / PBCH block according to this embodiment may be determined by the time position relationship between the half frame including the REDCAP PBCH and the half frame including the corresponding SS / PBCH block. For example, the half frame including the REDCAP PBCH may be a half frame that is a predetermined time offset from the half frame including the corresponding SS / PBCH block. For example, the time position of the REDCAP PBCH in the half frame including the REDCAP PBCH may be the same as the time position of the SS / PBCH block in the half frame including the corresponding SS / PBCH block.

[0125] The starting subcarrier of the REDCAP PBCH according to this embodiment may be a subcarrier obtained by adding a predetermined frequency offset to the starting subcarrier of the corresponding SS / PBCH block. However, if the value obtained by adding the frequency offset exceeds a certain value, the value obtained by subtracting the certain value may be used as the starting subcarrier of the REDCAP PBCH. For example, if the value obtained by adding a predetermined frequency offset to the starting subcarrier of the corresponding SS / PBCH block exceeds the bandwidth available for allocating the REDCAP PBCH, the value obtained by subtracting the bandwidth of the bandwidth available for allocating the REDCAP PBCH from the value obtained by adding the predetermined frequency offset to the starting subcarrier of the corresponding SS / PBCH block exceeds the bandwidth available for allocating the REDCAP PBCH may be used as the starting subcarrier of the REDCAP PBCH.

[0126] Fig. 14 is a diagram showing an example of a REDCAP PBCH block according to this embodiment and a half frame in which one or more REDCAP PBCH blocks are transmitted. Fig. 14 shows an example in which a half frame including a REDCAP PBCH block exists between half frames including SS / PBCH blocks that exist at a constant period (SSB period), and the REDCAP PBCH block is composed of three consecutive OFDM symbols. The REDCAP PBCH block is transmitted using resources corresponding to one SS / PBCH block, and the REDCAP PBCH or DMRS for the REDCAP PBCH exists in all resources within the REDCAP PBCH block. Fig. 15 is a table showing an example of resources in which the REDCAP PBCH and DMRS for the REDCAP PBCH are allocated within the REDCAP PBCH block. For example, the sequence of modulation symbols for the REDCAP PBCH is M symb2The REDCAP PBCH block is composed of 180 symbols, and may be mapped to resources to which the DMRS for the REDCAP PBCH is not mapped among the first to 240th subcarriers of each of the three symbols in the REDCAP PBCH block (subcarriers with subcarrier numbers 0 to 239 relative to the starting subcarrier of the REDCAP PBCH block). The DMRS for the REDCAP PBCH symbol sequence is composed of 180 symbols, and may be mapped to resources to which the DMRS for the REDCAP PBCH is not mapped among the first to 240th subcarriers of each of the three symbols in the REDCAP PBCH block (subcarriers with subcarrier numbers 0 to 239 relative to the starting subcarrier of the REDCAP PBCH block). However, the number of symbols constituting the REDCAP PBCH block does not have to be three. For example, the REDCAP PBCH block is composed of four symbols, and the REDCAP PBCH or the DMRS for the REDCAP PBCH may exist for the 240 subcarriers of each symbol. However, the number of subcarriers constituting the REDCAP PBCH block does not have to be 240. For example, a REDCAP PBCH block consists of 180 subcarriers and 4 OFDM symbols, and a REDCAP PBCH or a DMRS for the REDCAP PBCH may exist for the 180 subcarriers of each symbol.

[0127] Fig. 16 is a diagram showing an example of a REDCAP PBCH block according to this embodiment. Fig. 16 shows an example in which a REDCAP PBCH block exists in a half frame including SS / PBCH blocks that exist at a constant period (SSB period), and the REDCAP PBCH block is composed of four consecutive OFDM symbols. The REDCAP PBCH block is transmitted using resources corresponding to one SS / PBCH block, and the REDCAP PBCH or DMRS for the REDCAP PBCH exists in all resources in the REDCAP PBCH block. For example, the sequence of modulation symbols for the REDCAP PBCH is M symb2The REDCAP PBCH block may be composed of 240 symbols, and may be mapped to resources to which the DMRS for the REDCAP PBCH is not mapped, among the first to 240th subcarriers of each of the four symbols in the REDCAP PBCH block (subcarriers with subcarrier numbers 0 to 239 relative to the starting subcarrier of the REDCAP PBCH block). The DMRS for the REDCAP PBCH symbol sequence may be composed of 240 symbols, and may be mapped to resources to which the DMRS for the REDCAP PBCH is not mapped, among the first to 240th subcarriers of each of the four symbols in the REDCAP PBCH block (subcarriers with subcarrier numbers 0 to 239 relative to the starting subcarrier of the REDCAP PBCH block). However, the REDCAP PBCH or the DMRS for the REDCAP PBCH may not exist in all resources in the REDCAP PBCH block. For example, the REDCAP PBCH block may be composed of 4 symbols, one of which may be set to 0.

[0128] Fig. 17 is a diagram showing another example of a REDCAP PBCH block according to this embodiment. Fig. 17 shows an example in which a REDCAP PBCH block exists in some slots in a half frame including SS / PBCH blocks that exist at a constant period (SSB period), and the REDCAP PBCH block is composed of four consecutive OFDM symbols. However, the slot in which the REDCAP PBCH block is arranged may be a slot that does not include candidate resources for the SS / PBCH block. The REDCAP PBCH block is transmitted using resources corresponding to one SS / PBCH block, and the REDCAP PBCH or DMRS for the REDCAP PBCH exists in all resources in the REDCAP PBCH block. For example, the sequence of modulation symbols for the REDCAP PBCH is M symb2The REDCAP PBCH block may be composed of 240 symbols, and may be mapped to resources where DMRS for the REDCAP PBCH is not mapped, among the first to 240th subcarriers of each of the four symbols in the REDCAP PBCH block (subcarriers with subcarrier numbers 0 to 239 relative to the starting subcarrier of the REDCAP PBCH block). The REDCAP PBCH symbol sequence may be composed of 240 symbols, and may be mapped to resources where DMRS for the REDCAP PBCH is not mapped, among the first to 240th subcarriers of each of the four symbols in the REDCAP PBCH block (subcarriers with subcarrier numbers 0 to 239 relative to the starting subcarrier of the REDCAP PBCH block). However, the REDCAP PBCH or DMRS for the REDCAP PBCH may not be present in all resources in the REDCAP PBCH block. For example, the REDCAP PBCH block may be composed of 4 symbols, one of which may be set to 0, and the REDCAP PBCH and DMRS for the REDCAP PBCH may be present in the remaining three symbols.

[0129] Different SSB indices may be assigned to one or more REDCAP PBCH blocks in a half frame (REDCAP PBCH burst set) including a REDCAP PBCH. A REDCAP PBCH block assigned a certain SSB index may be associated with the SS / PBCH block of that SSB index and transmitted periodically by the base station device 3. However, multiple REDCAP PBCH blocks assigned the same SSB index may exist for one SS / PBCH block. For example, REDCAP PBCH blocks assigned the same SSB index may be transmitted multiple times within an SSB period.

[0130] The time position of the half frame to which the REDCAP PBCH block is mapped may be determined based on information identifying the SFN and / or information identifying the half frame included in the PBCH of the corresponding SS / PBCH block and / or the REDCAP PBCH of the REDCAP PBCH block, and the time offset between the corresponding SS / PBCH block and the REDCAP PBCH block. However, the information identifying the SFN and / or information identifying the half frame included in the REDCAP PBCH of the REDCAP PBCH block may be information identifying the SFN and half frame in which the corresponding SS / PBCH block is transmitted. The terminal device 1 that receives the REDCAP PBCH block may determine the SFN and half frame in which the corresponding SS / PBCH block is transmitted based on the received REDCAP PBCH block.

[0131] An SSB index is assigned to a REDCAP PBCH block according to its time position within the transmitted half-frame. The terminal device 1 identifies the SSB index based on REDCAP PBCH information and / or reference signal information included in the detected REDCAP PBCH block.

[0132] SS / PBCH blocks with the same relative time within each SS burst set in multiple SS burst sets may be assigned the same SSB index. SS / PBCH blocks with the same relative time within each SS burst set in multiple SS burst sets may be assumed to be QCL (or to have the same downlink transmit beam). Furthermore, antenna ports with SS / PBCH blocks with the same relative time within each SS burst set in multiple SS burst sets may be assumed to be QCL with respect to mean delay, Doppler shift, and spatial correlation.

[0133] Within a period of a certain SS burst set, SS / PBCH blocks and REDCAP PBCH blocks assigned the same SSB index may be assumed to be QCL with respect to average delay, average gain, Doppler spread, Doppler shift, and spatial correlation.

[0134] A terminal device 1 according to this embodiment receives an SS / PBCH block and a corresponding REDCAP PBCH block. Having detected the PSS and SSS in the SS / PBCH block, the terminal device 1 receives the PBCH in the SS / PBCH block and also receives the REDCAP PBCH in the corresponding REDCAP PBCH block. Since the PBCH in the SS / PBCH block and the REDCAP PBCH in the corresponding REDCAP PBCH block contain the same information, the terminal device 1 can improve the detection accuracy of the information contained in the PBCH. However, only terminal devices 1 having predetermined capabilities may receive the REDCAP PBCH block. For example, a terminal device 1 having limited capabilities for purposes such as reducing device costs and / or power consumption is referred to as being compatible with REDCAP (Reduction Capability), and a terminal device 1 compatible with REDCAP receives the SS / PBCH block and / or the REDCAP PBCH block, while a terminal device 1 not compatible with REDCAP receives only the SS / PBCH block and does not receive the REDCAP PBCH block.

[0135] The terminal device 1 according to this embodiment receives, in a certain radio frame, a PSS / SSS, a PBCH, and an SS / PBCH block to which a DMRS for the PBCH is mapped, and receives, in the same or a different radio frame, a REDCAP PBCH and a REDCAP The DMRS for the PBCH may be received, and the MIB of the transport block transmitted on the PBCH and the REDCAP PBCH may be obtained, where the PBCH and the REDCAP PBCH carry at least the MIB and additional bit information, and the radio frame in which the SS / PBCH block was transmitted may be identified based on the MIB and additional bit information.

[0136] However, the PBCH may be mapped with a PBCH modulated symbol group generated by performing a first scrambling process, a CRC attachment process, a first channel coding process, a first rate matching process, a second scrambling process, and a modulation process on a bit string including the MIB and additional bit information, and the REDCAP PBCH may be mapped with a PBCH modulated symbol group generated by performing a third scrambling process, a CRC attachment process, a second channel coding process, a second rate matching process, a fourth scrambling process, and a modulation process on a bit string including the MIB and additional bit information. However, the first scrambling process and the third scrambling process may be scrambling processes based on part of the bit information of the SFN indicating the radio frame in which the SS / PBCH block is transmitted. However, the second scrambling process may be a scrambling process based on the number of bits output by the first rate matching, and the fourth scrambling process may be a scrambling process based on the number of bits output by the second rate matching. However, the first scrambling process and the third scrambling process may be scrambling processes performed using the same bit sequence of the same scrambling sequence, and the second scrambling process and the fourth scrambling process may be scrambling processes performed using different bit sequences.

[0137] The terminal device 1 of this embodiment may receive an SS / PBCH block to which PSS / SSS, PBCH and DMRS for PBCH are mapped in a certain radio frame, receive a REDCAP PBCH and DMRS for REDCAP PBCH in the same or a different radio frame as the certain radio frame, and acquire the MIB of the transport block transmitted on the PBCH and REDCAP PBCH.

[0138] Hereinafter, the reference signals described in this embodiment include downlink reference signals, synchronization signals, SS / PBCH blocks, downlink DM-RS, CSI-RS, uplink reference signals, SRS, and / or uplink DM-RS. For example, in this embodiment, the downlink reference signals, synchronization signals, and / or SS / PBCH blocks may be referred to as reference signals. Reference signals used in the downlink include downlink reference signals, synchronization signals, SS / PBCH blocks, downlink DM-RS, CSI-RS, etc. Reference signals used in the uplink include uplink reference signals, SRS, and / or uplink DM-RS, etc.

[0139] The reference signal may also be used for radio resource measurement (RRM) and beam management.

[0140] Beam management may be a procedure performed by the base station device 3 and / or the terminal device 1 to align the directivity of an analog and / or digital beam in the transmitting device (the base station device 3 in the downlink and the terminal device 1 in the uplink) with the directivity of an analog and / or digital beam in the receiving device (the terminal device 1 in the downlink and the base station device 3 in the uplink) to obtain beam gain.

[0141] In addition, procedures for configuring, setting up or establishing a beam pair link may include the following procedures. Beam selection Beam refinement Beam recovery

[0142] For example, beam selection may be a procedure for selecting a beam in communication between the base station device 3 and the terminal device 1. Furthermore, beam improvement may be a procedure for selecting a beam with a higher gain, or for changing the beam between the base station device 3 and the terminal device 1 to the optimal one due to movement of the terminal device 1. Beam recovery may be a procedure for reselecting a beam when the quality of the communication link deteriorates in communication between the base station device 3 and the terminal device 1 due to blockage caused by the passage of an obstruction or a person.

[0143] Beam management may include beam selection, beam improvement, and beam recovery. Beam failure detection -Discovery of new beams · Sending a beam recovery request Monitor responses to beam recovery requests

[0144] For example, the RSRP (Reference Signal Received Power) of the SSS included in the CSI-RS or SS / PBCH block may be used, or the CSI may be used, when selecting a transmission beam of the base station device 3 in the terminal device 1. Furthermore, a CSI-RS Resource Index (CRI) may be used as a report to the base station device 3, or an index indicated by a sequence of the PBCH included in the SS / PBCH block and / or a demodulation reference signal (DMRS) used for demodulating the PBCH may be used.

[0145] Furthermore, the base station device 3 instructs the terminal device 1 of a time index of CRI or SS / PBCH when instructing the terminal device 1 to direct a beam, and the terminal device 1 receives based on the instructed time index of CRI or SS / PBCH. At this time, the terminal device 1 may set a spatial filter based on the instructed time index of CRI or SS / PBCH and receive. Furthermore, the terminal device 1 may receive using a quasi-co-location (QCL) assumption. When a signal (antenna port, synchronization signal, reference signal, etc.) is "QCL" with another signal (antenna port, synchronization signal, reference signal, etc.) or when "the QCL assumption is used," this may be interpreted as meaning that one signal is associated with another signal.

[0146] Two antenna ports are said to be QCL if the long-term properties of the channel through which a symbol at one antenna port is carried can be inferred from the channel through which a symbol at the other antenna port is carried. The long-term properties of the channel include one or more of delay spread, Doppler spread, Doppler shift, average gain, and average delay. For example, if antenna port 1 and antenna port 2 are QCL with respect to average delay, this means that the receive timing of antenna port 2 can be inferred from the receive timing of antenna port 1.

[0147] This QCL can also be extended to beam management. For this purpose, a spatially extended QCL may be newly defined. For example, the long-term channel properties assumed in the spatial domain of the QCL may include the angle of arrival (AoA, ZoA, etc.) and / or angular spread (e.g., ASA (Angle Spread of Arrival) and ZSA (Zenith angle Spread of Arrival)) of the wireless link or channel, the angle of departure (AoD, ZoD, etc.) and its angular spread (e.g., ASD (Angle Spread of Departure) and ZSD (Zenith angle Spread of Departure)), spatial correlation, and reception spatial parameters.

[0148] For example, if antenna port 1 and antenna port 2 can be considered as a QCL in terms of receive spatial parameters, this means that the receive beam for receiving a signal from antenna port 2 can be inferred from the receive beam (receive spatial filter) for receiving a signal from antenna port 1.

[0149] A QCL type may be defined as a combination of long-range properties that may be considered to be a QCL. For example, the following types may be defined: Type A: Doppler shift, Doppler spread, average delay, delay spread Type B: Doppler shift, Doppler spread Type C: Average delay, Doppler shift Type D: Reception spatial parameters

[0150] The above-mentioned QCL types may be set and / or indicated as a transmission configuration indication (TCI) in the RRC and / or MAC layer and / or DCI, indicating the assumed QCLs for one or two reference signals and the PDCCH or PDSCH DMRS. For example, if SS / PBCH block index #2 and QCL type A+QCL type B are set and / or indicated as one state of the TCI when the terminal device 1 receives the PDCCH, the terminal device 1 may receive the PDCCH DMRS and perform synchronization and channel estimation by considering the Doppler shift, Doppler spread, average delay, delay spread, reception spatial parameters, and long-term channel characteristics when receiving the SS / PBCH block index #2. In this case, the reference signal indicated by the TCI (the SS / PBCH block in the above example) may be referred to as a source reference signal, and the reference signal (the PDCCH DMRS in the above example) that is affected by the long-term characteristics inferred from the long-term channel characteristics when receiving the source reference signal may be referred to as a target reference signal. Furthermore, the TCI may be configured by RRC with one or more TCI states and a combination of a source reference signal and a QCL type for each state, and may be indicated to the terminal device 1 by the MAC layer or DCI.

[0151] With this method, the operation of the base station device 3 and the terminal device 1 equivalent to beam management may be defined as beam management and beam instruction / reporting based on the assumption of QCL in the spatial domain and radio resources (time and / or frequency).

[0152] 18 is a diagram showing an example of beamforming. Multiple antenna elements are connected to one transmitting unit (TXRU: Transceiver unit) 50, and the phase is controlled by a phase shifter 51 for each antenna element, and the signal is transmitted from an antenna element 52, thereby enabling a beam to be directed in any direction. Typically, the TXRU may be defined as an antenna port, and only the antenna port may be defined in the terminal device 1. Since the directivity can be directed in any direction by controlling the phase shifter 51, the base station device 3 can communicate with the terminal device 1 using a high-gain beam.

[0153] The configuration of the device in this embodiment will be described below.

[0154] 19 is a schematic block diagram showing the configuration of a terminal device 1 of this embodiment. As shown in the figure, the terminal device 1 includes a radio transmission / reception unit 10 and an upper layer processing unit 14. The radio transmission / reception unit 10 includes an antenna unit 11, an RF (Radio Frequency) unit 12, and a baseband unit 13. The upper layer processing unit 14 includes a medium access control layer processing unit 15 and a radio resource control layer processing unit 16. The radio transmission / reception unit 10 is also referred to as a transmitter, a receiver, a monitor, or a physical layer processing unit. The upper layer processing unit 14 is also referred to as a processing unit 14, a measurement unit 14, a selection unit 14, a determination unit 14, or a control unit 14.

[0155] The upper layer processing unit 14 outputs uplink data (which may be referred to as a transport block) generated by a user operation or the like to the radio transceiver unit 10. The upper layer processing unit 14 performs some or all of the processing of the Medium Access Control (MAC) layer, the Packet Data Convergence Protocol (PDCP) layer, the Radio Link Control (RLC) layer, and the Radio Resource Control (RRC) layer. The upper layer processing unit 14 may have a function to acquire bit information of the transport block of the MIB. The upper layer processing unit 14 may have a function to determine the number of repetitions of the PDCCH transmitted in the common search space set. The upper layer processing unit 14 may have a function to determine that the PDCCH is not being transmitted when an index indicated by an RRC parameter is a predetermined value, and to monitor the physical downlink control channel in the first search space set based on the number of repetitions corresponding to the index when the index is not the predetermined value.

[0156] The medium access control layer processing unit 15 included in the upper layer processing unit 14 performs processing of the MAC layer (medium access control layer). The medium access control layer processing unit 15 controls transmission of scheduling requests based on various setting information / parameters managed by the radio resource control layer processing unit 16.

[0157] The radio resource control layer processing unit 16 included in the upper layer processing unit 14 performs processing of the RRC layer (radio resource control layer). The radio resource control layer processing unit 16 manages various setting information / parameters of its own device. The radio resource control layer processing unit 16 sets various setting information / parameters based on upper layer signals received from the base station device 3. That is, the radio resource control layer processing unit 16 sets various setting information / parameters based on information indicating the various setting information / parameters received from the base station device 3. The radio resource control layer processing unit 16 controls (specifies) resource allocation based on downlink control information received from the base station device 3.

[0158] The radio transceiver 10 performs physical layer processing such as modulation, demodulation, encoding, and decoding. The radio transceiver 10 separates, demodulates, and decodes signals received from the base station device 3, and outputs the decoded information to the upper layer processing unit 14. The radio transceiver 10 generates transmission signals by modulating and encoding data, and transmits the signals to the base station device 3, etc. The radio transceiver 10 outputs upper layer signals (RRC messages), DCI, etc. received from the base station device 3 to the upper layer processing unit 14. The radio transceiver 10 also generates and transmits uplink signals (including PUCCH and / or PUSCH) based on instructions from the upper layer processing unit 14. The radio transceiver 10 may be equipped with a function to receive a PDCCH and / or a PDSCH. The radio transceiver 10 may be equipped with a function to transmit one or more PUCCHs and / or PUSCHs. The radio transceiver 10 may be equipped with a function to receive DCI on the PDCCH. The radio transceiver 10 may have a function of outputting DCI received on the PDCCH to the upper layer processing unit 14. The radio transceiver 10 may have a function of receiving PSS, SSS, PBCH, DMRS for PBCH, REDCAP PBCH, and / or DMRS for REDCAP PBCH. The radio transceiver 10 may have a function of receiving SS / PBCH blocks and / or REDCAP PBCH blocks.

[0159] The RF unit 12 converts the signal received via the antenna unit 11 into a baseband signal by quadrature demodulation (down-converts) and removes unnecessary frequency components. The RF unit 12 outputs the processed analog signal to the baseband unit.

[0160] The baseband unit 13 converts the analog signal input from the RF unit 12 into a digital signal. The baseband unit 13 removes a portion corresponding to a CP (Cyclic Prefix) from the converted digital signal, and performs a Fast Fourier Transform (FFT) on the signal from which the CP has been removed to extract a signal in the frequency domain.

[0161] The baseband unit 13 performs an Inverse Fast Fourier Transform (IFFT) on the data to generate OFDM symbols, adds CPs to the generated OFDM symbols, generates baseband digital signals, and converts the baseband digital signals into analog signals. The baseband unit 13 outputs the converted analog signals to the RF unit 12.

[0162] The RF unit 12 uses a low-pass filter to remove unnecessary frequency components from the analog signal input from the baseband unit 13, up-converts the analog signal to a carrier frequency, and transmits it via the antenna unit 11. The RF unit 12 also amplifies power. The RF unit 12 may also have a function of determining the transmission power of an uplink signal and / or an uplink channel to be transmitted in the serving cell. The RF unit 12 is also referred to as a transmission power control unit.

[0163] 20 is a schematic block diagram showing the configuration of a base station device 3 according to this embodiment. As shown in the figure, the base station device 3 includes a radio transmission / reception unit 30 and an upper layer processing unit 34. The radio transmission / reception unit 30 includes an antenna unit 31, an RF unit 32, and a baseband unit 33. The upper layer processing unit 34 includes a medium access control layer processing unit 35 and a radio resource control layer processing unit 36. The radio transmission / reception unit 30 is also referred to as a transmitter, a receiver, a monitor, or a physical layer processing unit. A control unit that controls the operation of each unit based on various conditions may also be provided separately. The upper layer processing unit 34 is also referred to as a processing unit 34, a determination unit 34, or a control unit 34.

[0164] The upper layer processing unit 34 performs some or all of the processing of the Medium Access Control (MAC) layer, the Packet Data Convergence Protocol (PDCP) layer, the Radio Link Control (RLC) layer, and the Radio Resource Control (RRC) layer. The upper layer processing unit 34 may have a function to generate DCI based on the upper layer signal transmitted to the terminal device 1 and the time resource for transmitting the PUSCH. The upper layer processing unit 34 may have a function to output the generated DCI, etc. to the radio transceiver unit 30. The upper layer processing unit 34 may have a function to generate bit information of the transport block of the MIB. The upper layer processing unit 34 may have a function to generate bit information of the transport block of the REDCAP MIB. The upper layer processing unit 34 may have a function to set an index indicated by an RRC parameter to a predetermined value when the PDCCH is not transmitted using the common search space set, and to set the index to a value corresponding to the number of repeated transmissions of the PDCCH transmitted using the common search space set when the PDCCH is to be transmitted.

[0165] The media access control layer processing unit 35 included in the upper layer processing unit 34 performs processing of the MAC layer. The media access control layer processing unit 35 performs processing related to the scheduling request based on various setting information / parameters managed by the radio resource control layer processing unit 36.

[0166] The radio resource control layer processing unit 36 ​​included in the upper layer processing unit 34 performs processing of the RRC layer. The radio resource control layer processing unit 36 ​​generates DCI (uplink grant, downlink grant) including resource allocation information for the terminal device 1. The radio resource control layer processing unit 36 ​​generates or acquires from an upper node DCI, downlink data (transport block (TB), random access response (RAR)) to be allocated to the PDSCH, system information, RRC messages, MAC Control Elements (CEs), and the like, and outputs them to the radio transceiver unit 30. The radio resource control layer processing unit 36 ​​also manages various setting information / parameters for each terminal device 1. The radio resource control layer processing unit 36 ​​may set various setting information / parameters for each terminal device 1 via upper layer signals. That is, the radio resource control layer processing unit 36 ​​transmits / reports information indicating various setting information / parameters. The radio resource control layer processing unit 36 ​​may also transmit / report information for specifying the setting of one or more reference signals in a certain cell.

[0167] When the base station device 3 transmits an RRC message, a MAC CE, and / or a PDCCH to the terminal device 1 and the terminal device 1 performs processing based on the reception thereof, the base station device 3 performs processing (control of the terminal device 1 and the system) assuming that the terminal device is performing the processing. In other words, the base station device 3 sends the terminal device 1 an RRC message, a MAC CE, and / or a PDCCH that causes the terminal device to perform processing based on the reception thereof.

[0168] The radio transceiver 30 transmits higher layer signals (RRC messages), DCI, etc. to the terminal device 1. The radio transceiver 30 also receives uplink signals transmitted from the terminal device 1 based on instructions from the higher layer processing unit 34. The radio transceiver 30 may have a function of transmitting a PDCCH and / or a PDSCH. The radio transceiver 30 may have a function of receiving one or more PUCCHs and / or PUSCHs. The radio transceiver 30 may have a function of transmitting DCI on a PDCCH. The radio transceiver 30 may have a function of transmitting DCI output by the higher layer processing unit 34 on a PDCCH. The radio transceiver 30 may have a function of transmitting a PSS, an SSS, a PBCH, a DMRS for the PBCH, a REDCAP PBCH, and / or a DMRS for the REDCAP PBCH. The radio transceiver 30 may have a function of transmitting an SS / PBCH block and / or a REDCAP PBCH block. The radio transceiver 30 may have a function of transmitting an RRC message (which may be an RRC parameter). The radio transceiver unit 30 may have a function of transmitting the physical downlink control channel in the first search space set based on the number of symbols and the number of repeated transmissions corresponding to an index indicated by an RRC parameter. Other functions of the radio transceiver unit 30 are similar to those of the radio transceiver unit 10, and therefore description thereof will be omitted. Note that when the base station device 3 is connected to one or more transmission / reception points 4, some or all of the functions of the radio transceiver unit 30 may be included in each transmission / reception point 4.

[0169] Furthermore, the upper layer processing unit 34 transmits (transfers) or receives control messages or user data between base station devices 3 or between upper network devices (MME, S-GW (Serving-GW)) and the base station device 3. In Fig. 20, other components of the base station device 3 and transmission paths of data (control information) between the components are omitted, but it is clear that the upper layer processing unit 34 has, as its components, a plurality of blocks having other functions necessary for operating as the base station device 3. For example, the upper layer processing unit 34 includes a radio resource management layer processing unit and an application layer processing unit.

[0170] Note that the "parts" in the figure are elements that realize the functions and procedures of the terminal device 1 and the base station device 3, and may also be expressed by terms such as section, circuit, component, device, and unit.

[0171] Each of the units designated by reference numerals 10 to 16 in the terminal device 1 may be configured as a circuit. Each of the units designated by reference numerals 30 to 36 in the base station device 3 may be configured as a circuit.

[0172] (1) A terminal device 1 according to a first aspect of the present invention includes a receiving unit 10 that receives a master information block (MIB or REDCAP MIB) including an RRC parameter indicating an index of a first table on a physical broadcast channel (PBCH or REDCAP PBCH), and each index of the first table corresponds to the number of symbols of a control resource set (CORESET) of a first search space set (CSS set) and the number of repetitions of a physical downlink control channel (PDCCH) transmitted in the first search space set; The RRC parameter setting unit includes a processing unit 14 that monitors the physical downlink control channel in the first search space set based on the number of symbols and the number of repeated transmissions corresponding to the index indicated by the RRC parameter.

[0173] (2) In a second aspect of the present invention, the base station device 3 comprises a processing unit 34 that generates a master information block (MIB or REDCAP MIB) including RRC parameters indicating an index of a first table, and a transmission unit 30 that transmits the master information block on a physical broadcast channel (PBCH or REDCAP PBCH), wherein each index of the first table corresponds to the number of symbols of a control resource set (CORESET) of a first search space set (CSS set) and the number of repetitions of the physical downlink control channel (PDCCH) transmitted in the first search space set, and the transmission unit 34 transmits the physical downlink control channel in the first search space set based on the number of symbols and the number of repetitions corresponding to the index indicated by the RRC parameters.

[0174] (3) A terminal device 1 in a third aspect of the present invention includes a receiving unit 10 that receives a master information block (MIB or REDCAP MIB) including an RRC parameter indicating a first index on a physical broadcast channel (PBCH or REDCAP PBCH), and a processing unit 14 that determines the number of repetitions of a physical downlink control channel (PDCCH) transmitted in a first search space set (CSS set) based on the first index, and the processing unit 14 determines that the physical downlink control channel is not being transmitted when the first index is a predetermined value (e.g., 0), and monitors the physical downlink control channel in the first search space set based on the number of repetitions of the transmission when the first index is not the predetermined value.

[0175] (4) A base station device 3 in a fourth aspect of the present invention includes a processing unit 34 that generates RRC parameters indicating a first index, and a transmission unit 30 that transmits a master information block (MIB or REDCAP MIB) including the RRC parameters on a physical broadcast channel (PBCH or REDCAP PBCH), and the processing unit 34 sets the first index to a predetermined value (e.g., 0) when a physical downlink control channel (PDCCH) is not transmitted in a first search space set (CSS set), and sets the first index to a value corresponding to the number of repeated transmissions of the physical downlink control channel transmitted in the first search space set when the physical downlink control channel is transmitted in the first search space set.

[0176] This allows efficient communication between the terminal device 1 and the base station device 3. For example, the base station device 3 can efficiently notify the terminal device 1 of the number of repeated transmissions of the PDCCH using a limited REDCAP PBCH payload.

[0177] A program running on an apparatus according to one aspect of the present invention may be a program that controls a central processing unit (CPU) or the like to cause a computer to function so as to realize the functions of an embodiment according to one aspect of the present invention. The program or information handled by the program is temporarily stored in a volatile memory such as a random access memory (RAM), a non-volatile memory such as a flash memory, a hard disk drive (HDD), or another storage device system.

[0178] A program for implementing the functions of an embodiment according to one aspect of the present invention may be recorded on a computer-readable recording medium. The program may be loaded into a computer system and executed. The term "computer system" as used herein refers to a computer system built into a device, including hardware such as an operating system and peripheral devices. The term "computer-readable recording medium" may refer to a semiconductor recording medium, an optical recording medium, a magnetic recording medium, a medium that dynamically stores a program for a short period of time, or any other computer-readable recording medium.

[0179] Additionally, each functional block or feature of the device used in the above-described embodiments may be implemented or performed by an electrical circuit, such as an integrated circuit or multiple integrated circuits. The electrical circuit designed to perform the functions described herein may include a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or a combination thereof. The general-purpose processor may be a microprocessor, or a conventional processor, controller, microcontroller, or state machine. The electrical circuit may be composed of digital circuits or analog circuits. Furthermore, as advances in semiconductor technology emerge, one or more aspects of the present invention may utilize new integrated circuit technologies that replace current integrated circuits.

[0180] In the embodiment relating to one aspect of the present invention, an example has been described in which the present invention is applied to a communication system consisting of a base station device and a terminal device, but it can also be applied to a system in which terminals communicate with each other, such as D2D (Device to Device).

[0181] The present invention is not limited to the above-described embodiment. Although an example of a device has been described in the embodiment, the present invention is not limited to this and can be applied to terminal devices or communication devices such as stationary or non-movable electronic devices installed indoors or outdoors, for example, AV equipment, kitchen equipment, cleaning / washing equipment, air conditioning equipment, office equipment, vending machines, and other household appliances.

[0182] Although the embodiments of the present invention have been described above in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and design modifications and the like are also included within the scope of the gist of the present invention. Furthermore, various modifications of one aspect of the present invention are possible within the scope of the claims, and embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention. Furthermore, configurations in which elements described in the above embodiments are substituted with elements that achieve the same effect are also included. [Industrial Applicability]

[0183] One aspect of the present invention can be used in, for example, a communication system, a communication device (for example, a mobile phone device, a base station device, a wireless LAN device, or a sensor device), an integrated circuit (for example, a communication chip), or a program. [Explanation of symbols]

[0184] 1(1A, 1B) Terminal equipment 3 Base station equipment 4 Transmit / Receive Point (TRP) 10 Radio transmitter / receiver 11 Antenna section 12 RF section 13 Baseband section 14 Upper layer processing unit 15 Medium access control layer processing unit 16 Radio resource control layer processing unit 30 Radio transmitter / receiver 31 Antenna section 32 RF section 33 Baseband section 34 Upper layer processing unit 35 Medium access control layer processing unit 36 Radio resource control layer processing unit 50 Transmitting Unit (TXRU) 51 Phase Shifter 52 Antenna Element

Claims

1. A terminal device, a receiving unit that receives the first master information block on a first physical broadcast channel included in the synchronization signal block and receives the second master information block on a second physical broadcast channel; a determination unit that determines a first table based on a subcarrier spacing used in the synchronization signal block and a subcarrier spacing used in the second physical broadcast channel; Equipped with Each row of the first table corresponds to the number of symbols of a control resource set of a first search space set and the number of repeated transmissions of a physical downlink control channel transmitted in the first search space set; a processing unit configured to monitor the physical downlink control channel in the first search space set based on the number of symbols and the number of repeated transmissions corresponding to a row indicated by a first index included in the second master information block in the first table; Terminal device.

2. A base station device, a determination unit that determines a first table based on a subcarrier spacing used for the synchronization signal block and a subcarrier spacing used for the second physical broadcast channel; a processing unit that generates a second master information block including an RRC parameter indicating the first index; a transmitter that transmits a first master information block on a first physical broadcast channel included in the synchronization signal block and transmits the second master information block on the second physical broadcast channel; Equipped with Each row of the first table corresponds to the number of symbols of a control resource set of a first search space set and the number of repeated transmissions of a physical downlink control channel transmitted in the first search space set; the transmitter transmits the physical downlink control channel in the first search space set based on the number of symbols and the number of repeated transmissions corresponding to a row in the first table indicated by a first index included in the second master information. Base station equipment.

3. A communication method for a terminal device, comprising: receiving a first master information block on a first physical broadcast channel included in a synchronization signal block, and receiving a second master information block on a second physical broadcast channel; determining a first table based on a subcarrier spacing used for the synchronization signal block and a subcarrier spacing used for the second physical broadcast channel; Each row of the first table corresponds to the number of symbols of a control resource set of a first search space set and the number of repeated transmissions of a physical downlink control channel transmitted in the first search space set; monitoring the physical downlink control channel in the first search space set based on the number of symbols and the number of repeated transmissions corresponding to a row indicated by a first index included in the second master information block in the first table; Communication method.

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